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On August 10, 2021, this report was posted online as an MMWR Early Release.
Hannah G. Rosenblum, MD1 ,2; Stephen C. Hadler, MD1; Danielle Moulia, MPH1; Tom T. Shimabukuro, MD1; John R. Su, MD, PhD1; Naomi K. Tepper, MD1; Kevin C. Ess, MD, PhD3; Emily Jane Woo, MD4; Adamma Mba-Jonas, MD4; Meghna Alimchandani, MD4; Narayan Nair, MD4; Nicola P. Klein, MD, PhD5; Kayla E. Hanson, MPH6; Lauri E. Markowitz, MD1; Melinda Wharton, MD1; Veronica V. McNally, JD7; José R. Romero, MD8; H. Keipp Talbot, MD3; Grace M. Lee, MD9; Matthew F. Daley, MD10; Sarah A. Mbaeyi, MD1; Sara E. Oliver, MD1 (View author affiliations)
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Summary
What is already known about this topic?
Rare serious adverse events have been reported after COVID-19 vaccination, including Guillain-Barré syndrome (GBS) and thrombosis with thrombocytopenia syndrome (TTS) after Janssen COVID-19 vaccination and myocarditis after mRNA (Pfizer-BioNTech and Moderna) COVID-19 vaccination.
What is added by this report?
On July 22, 2021, the Advisory Committee on Immunization Practices reviewed updated benefit-risk analyses after Janssen and mRNA COVID-19 vaccination and concluded that the benefits outweigh the risks for rare serious adverse events after COVID-19 vaccination.
What are the implications for public health practice?
Continued COVID-19 vaccination will prevent COVID-19 morbidity and mortality far exceeding GBS, TTS, and myocarditis cases expected. Information about rare adverse events should be disseminated to providers, vaccine recipients, and the public.
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In December 2020, the Food and Drug Administration (FDA) issued Emergency Use Authorizations (EUAs) for Pfizer-BioNTech and Moderna COVID-19 vaccines, and in February 2021, FDA issued an EUA for the Janssen (Johnson & Johnson) COVID-19 vaccine. After each EUA, the Advisory Committee on Immunization Practices (ACIP) issued interim recommendations for vaccine use; currently Pfizer-BioNTech is authorized and recommended for persons aged ≥12 years and Moderna and Janssen for persons aged ≥18 years (1–3). Both Pfizer-BioNTech and Moderna vaccines, administered as 2-dose series, are mRNA-based COVID-19 vaccines, whereas the Janssen COVID-19 vaccine, administered as a single dose, is a recombinant replication-incompetent adenovirus-vector vaccine. As of July 22, 2021, 187 million persons in the United States had received at least 1 dose of COVID-19 vaccine (4); close monitoring of safety surveillance has demonstrated that serious adverse events after COVID-19 vaccination are rare (5,6). Three medical conditions have been reported in temporal association with receipt of COVID-19 vaccines. Two of these (thrombosis with thrombocytopenia syndrome [TTS], a rare syndrome characterized by venous or arterial thrombosis and thrombocytopenia, and Guillain-Barré syndrome [GBS], a rare autoimmune neurologic disorder characterized by ascending weakness and paralysis) have been reported after Janssen COVID-19 vaccination. One (myocarditis, cardiac inflammation) has been reported after Pfizer-BioNTech COVID-19 vaccination or Moderna COVID-19 vaccination, particularly after the second dose; these were reviewed together and will hereafter be referred to as mRNA COVID-19 vaccination. ACIP has met three times to review the data associated with these reports of serious adverse events and has comprehensively assessed the benefits and risks associated with receipt of these vaccines. During the most recent meeting in July 2021, ACIP determined that, overall, the benefits of COVID-19 vaccination in preventing COVID-19 morbidity and mortality outweigh the risks for these rare serious adverse events in adults aged ≥18 years; this balance of benefits and risks varied by age and sex. ACIP continues to recommend COVID-19 vaccination in all persons aged ≥12 years. CDC and FDA continue to closely monitor reports of serious adverse events and will present any additional data to ACIP for consideration. Information regarding risks and how they vary by age and sex and type of vaccine should be disseminated to providers, vaccine recipients, and the public.
Since June 2020, ACIP has convened 16 public meetings to review data on COVID-19 epidemiology and use of COVID-19 vaccines, most recently on July 22, 2021. The ACIP COVID-19 Vaccines Work Group, comprising experts in infectious diseases, vaccinology, vaccine safety, public health, and ethics, has held weekly meetings since April 2020 to review COVID-19 surveillance data, evidence for vaccine efficacy and safety, and implementation considerations for COVID-19 vaccination programs.
ACIP met to review reports of TTS after Janssen COVID-19 vaccination in April 2021; the committee met again in June 2021 to review reports of myocarditis after mRNA COVID-19 vaccination, particularly after the second dose. At both meetings, ACIP reviewed the individual- and population-level benefits and risks for vaccination and concluded that the benefits of vaccination for individual persons and at the population-level outweigh the risks; details of the findings have been described previously (7,8). FDA added information about these serious adverse events to the EUA fact sheets*; CDC updated patient and clinician education and communication materials,† and federal agencies continue to closely monitor reports of these serious adverse events.
On July 12, 2021, FDA issued a warning and updated EUA fact sheets after reports of a more than expected number of GBS cases to the Vaccine Adverse Events Reporting System (VAERS) after Janssen COVID-19 vaccination. GBS is a rare neurologic disorder characterized by acute or subacute onset of weakness in limbs or cranial nerve–innervated muscles and by laboratory findings of increased cerebrospinal fluid protein with normal numbers of cells; the clinical presentation and severity vary (9). GBS occurs more commonly in males than in females, and incidence increases with age; 3,000–6,000 GBS cases are reported annually in the United States.§ Patients might require intensive care unit (ICU) admission and ventilator support; although most patients recover, GBS can result in permanent paralysis or death (10).
After the reports of GBS cases after Janssen COVID-19 vaccination, the Work Group met to review clinical trial and postauthorization safety data for GBS. To comprehensively evaluate the benefits and risks associated with COVID-19 vaccination, in addition to reviewing a benefit-risk assessment of GBS after Janssen COVID-19 vaccination, the Work Group also updated benefit-risk assessments of TTS cases after Janssen COVID-19 vaccination and of myocarditis cases after mRNA COVID-19 vaccination in adults aged ≥18 years. The ACIP COVID-19 Vaccines Safety Technical (VaST) Work Group,¶ comprising independent vaccine safety expert consultants, performed concomitant review of the adverse events information.
On July 22, 2021, ACIP met to review currently available evidence of risks associated with COVID-19 vaccination. The findings from VaST and ACIP COVID-19 Vaccine Work Group assessments, including a summary of the data reviewed, were presented to ACIP during this meeting. ACIP's comprehensive assessment included risks for GBS and TTS after Janssen COVID-19 vaccination and myocarditis after mRNA COVID-19 vaccination in persons aged ≥18 years. To date, there has been no increased risk detected for GBS or TTS after mRNA COVID-19 vaccination, and there has been no increased risk detected for myocarditis after Janssen COVID-19 vaccination. Persons aged <18 years were not included in this assessment because a benefit-risk assessment for persons aged 12–29 years was recently presented to ACIP in June 2021**; ongoing safety monitoring continues and can be included in future updates to ACIP (8).
To assess the benefit-risk balance of COVID-19 vaccination in adults, ACIP reviewed an assessment comparing the benefits of vaccination (numbers of COVID-19 cases and severe disease outcomes prevented) to the risks (numbers of cases of GBS, TTS, and myocarditis), using methods similar to those described previously.†† Specifically, the benefits per million vaccine doses administered (i.e., the benefits of being fully vaccinated§§ in accordance with the FDA EUA) were assessed, including 1) COVID-19 cases prevented, based on rates during the week of June 13–19, 2021¶¶; 2) COVID-19 hospitalizations prevented, based on rates during the week of June 19, 2021***; and 3) COVID-19 ICU admissions and deaths prevented, based on the proportion of hospitalized patients who were admitted to an ICU or who died.†††
The risks assessed for the Janssen COVID-19 vaccination were 1) the number of GBS patients reported to VAERS that occurred within 42 days of Janssen COVID-19 vaccination per million doses administered through June 30, 2021, and 2) the number of patients with TTS reported to VAERS that occurred after Janssen COVID-19 vaccination per million doses through July 8, 2021. The risks for mRNA COVID-19 vaccination were assessed as the number of patients reported to VAERS with myocarditis after receipt of dose 2 of an mRNA COVID-19 vaccine per million doses. Each benefit-risk assessment was stratified by age group (18–29, 30–49, 50–64 and ≥65 years) and sex. The Janssen COVID-19 vaccine analysis assumed 90% vaccine effectiveness§§§ in preventing severe outcomes and 66% vaccine effectiveness in preventing COVID-19 cases for a 120-day period. The mRNA COVID-19 vaccine analysis assumed 95% vaccine effectiveness¶¶¶ in preventing severe outcomes and in preventing COVID-19 cases for a 120-day-period. The 120-day period was selected because inputs pertaining to community transmission have increased uncertainty beyond this period, particularly with regard to virus variants in circulation.**** Using GBS, TTS, and myocarditis cases reported to VAERS with age and sex data available, crude reporting rates†††† per million vaccine doses administered were calculated, overall and among subgroups, by sex and age using national COVID-19 vaccine administration data. GBS rates from the Vaccine Safety Datalink (VSD),§§§§ based on cases confirmed by medical record review, were also presented to and reviewed by ACIP.
As of June 30, 2021, approximately 12.6 million doses of Janssen COVID-19 vaccine had been administered in the United States to persons aged ≥18 years. Within VAERS,¶¶¶¶ 100 reports of GBS after Janssen COVID-19 vaccination were received during February 27–June 30, 2021. The median patient age was 57 years (range = 24–76); 61 (61%) were males, and the median interval from vaccination to symptom onset was 13 days (range = 0–75 days). Ninety-five (95%) patients experiencing GBS were hospitalized, and 10 (10%) were admitted to an ICU. Ninety-eight (98%) of these patients had disease onset within 42 days of vaccination. As of the most recent follow-up,***** one patient had died. The GBS reporting rate was 7.8 cases per million Janssen COVID-19 vaccine doses administered. Among subgroups by sex and age, the reporting rate to VAERS was highest among males aged 50–64 years, with 15.6 cases per million Janssen COVID-19 vaccine doses administered (Table 1). VSD has not identified a signal††††† for GBS after Janssen COVID-19 vaccination. However, based on medical record–confirmed GBS cases reported during the 21 days§§§§§ after receipt of Janssen COVID-19 vaccine, the unadjusted GBS rate in VSD was 20.2 per million doses administered (95% confidence interval = 8.1–41.7).¶¶¶¶¶
Through July 8, 2021, 38 cases of TTS within 15 days of vaccination and reported to VAERS met the case definition.****** These 38 reports were confirmed by physician reviewers at CDC and FDA and reviewed with the Clinical Immunization Safety Assessment Project Investigators, who include hematologists. Four of these patients died. The overall TTS reporting rate was 3.0 cases per million doses administered as of July 8, 2021. †††††† Among subgroups by sex and age, the reporting rate was highest among females aged 30–49 years (8.8 TTS cases per million Janssen COVID-19 vaccine doses administered).
As of June 30, 2021, approximately 141 million second mRNA COVID-19 vaccine doses had been administered in the United States to persons aged ≥18 years. Within VAERS, 497 reports of myocarditis after the second mRNA COVID-19 vaccine dose were received for persons aged ≥18 years. The reporting rate of myocarditis overall among adults was 3.5 cases per million second doses of mRNA COVID-19 vaccine administered. In subgroup analyses by age and sex, the reporting rate was highest among males aged 18–29 years (24.3 cases per million mRNA COVID-19 vaccine second doses administered). Reports of cases in persons aged 18–29 years were individually reviewed and confirmed to meet case definitions, whereas reports of cases in persons aged ≥30 years were received and processed§§§§§§ but not individually reviewed. There were no confirmed myocarditis-associated deaths.
The estimated benefits (prevention of COVID-19 disease and associated hospitalizations, ICU admissions, and deaths) outweighed the risks (expected cases of GBS, TTS, and myocarditis after vaccination) in all persons aged ≥18 years included in this analysis (Table 2). For example, per million doses of Janssen COVID-19 vaccine administered to males aged 50–64 years, 1,800 hospitalizations, 480 ICU admissions, and 140 deaths attributable to COVID-19 could be prevented, compared with 14–17 GBS cases and 1–2 TTS cases after Janssen COVID-19 vaccination. However, the balance of benefits and risks varied by age and sex because cases of each serious adverse event were primarily identified in specific subgroups of age and sex (primarily males aged 50–64 years for GBS; females aged 30–49 years for TTS; and males aged 18–29 years for myocarditis).
ACIP also reviewed population-level considerations, including that COVID-19 cases are rising in the United States, particularly with the predominance of the highly transmissible B.1.617.2 (Delta) variant. More than one half (61%) of U.S. adults aged ≥18 years are fully vaccinated (4); however, coverage is lower in some geographic regions. According to a jurisdictional survey conducted on July 16, 2021, most vaccination sites offer more than one type of vaccine and report that Janssen vaccine is used in a variety of populations and settings.¶¶¶¶¶¶
Based on a comprehensive review of existing data, in the context of ongoing transmission of SARS-CoV-2, the virus that causes COVID-19, in the United States as of July 2021, the ACIP concluded that 1) the benefits of vaccinating all recommended age groups with either the Janssen COVID-19 vaccine or mRNA COVID-19 vaccine outweigh the risks for vaccination, including the risks for GBS and TTS after Janssen COVID-19 vaccination, or myocarditis after mRNA COVID-19 vaccination; 2) continuing safety monitoring of serious adverse events after COVID-19 vaccination is critical; and 3) providers and the public should be informed about these potential harms and the use of COVID-19 vaccines. The analysis did not include potential benefits of preventing post–COVID-19 conditions, or likely ongoing benefits beyond the 120-day period; for these reasons, the benefits of COVID-19 vaccination are underestimated.
ACIP members discussed concerns about the clinical severity of the rare risk for GBS and TTS. In addition, they noted the importance of providing options for the type of COVID-19 vaccines offered, especially in the context of the current COVID-19 epidemiology and current vaccine coverage in the United States. ACIP emphasized the importance of informing vaccination providers, and all persons receiving COVID-19 vaccines about the benefits and risks, including the risks after Janssen COVID-19 vaccination for GBS, particularly in males aged 50–64 years, and for TTS among females aged 30–49; and the risk for myocarditis after mRNA COVID-19 vaccination, particularly in males aged 18–29 years. CDC has provided guidance regarding evaluation and management of GBS, TTS, and myocarditis.******* In addition to information about TTS, FDA has added information to the Janssen COVID-19 vaccine EUA and fact sheets regarding GBS cases that have been reported among vaccine recipients. The vaccine product-specific EUA fact sheet should be provided to all persons before vaccination with any authorized COVID-19 vaccine.
CDC has updated patient education and communication materials††††††† reflecting this information; these are important to ensure that vaccine recipients are aware of risks and that they should seek care if they experience concerning symptoms. Persons should be educated about their individual benefits and risks associated with COVID-19 vaccination, and when feasible, provided a choice about which type of COVID-19 vaccine to receive.
Based on ACIP's conclusion regarding the benefit-risk assessment on July 22, 2021, vaccination with any of the available COVID-19 vaccines licensed under the FDA EUAs continues to be recommended for all persons aged ≥18 years. With the Delta variant, this is more urgent than ever. In addition, the Pfizer-BioNTech COVID-19 vaccine continues to be recommended for persons aged ≥12 years.
CDC and FDA will continue to closely monitor reports of serious adverse events and will present any additional data to ACIP for consideration. The benefit-risk analyses for COVID-19 vaccines can be updated to reflect changes in epidemiology of the COVID-19 pandemic and additional information on the risk for serious adverse events after vaccination. ACIP recommendation for use of all COVID-19 vaccines under an EUA are interim and will be updated as additional information becomes available.
Reporting of Vaccine Adverse Events
FDA requires that vaccine providers report to VAERS vaccination administration errors, serious adverse events,§§§§§§§ cases of multisystem inflammatory syndrome, and cases of COVID-19 that result in hospitalization or death after administration of a COVID-19 vaccine under an EUA. CDC also encourages reporting of any additional clinically significant adverse event, even if it is not clear whether a vaccination caused the event. Information on how to submit a report to VAERS is available at https://vaers.hhs.gov/index.htmlexternal icon or 1-800-822-7967. In addition, CDC has developed a voluntary smartphone-based online tool (v-safe) that uses text messaging and online surveys to provide near real-time health check-ins after receipt of a COVID-19 vaccine. In cases of v-safe reports that include possible medically attended health events, CDC's v-safe call center follows up with the vaccine recipient to collect additional information for completion of a VAERS report. Information on v-safe is available at https://www.cdc.gov/vsafe.
Acknowledgments
Mary Chamberland, Thomas Clark, Amanda Cohn, Nathan Crawford, Frank DeStefano, Kathleen Dooling, Julia Gargano, Ruth Gallego, Julianne Gee, Sean Griffing, Fiona Havers, Lauri Hicks, Amelia Jazwa, Tara Johnson, Gayle Langley, Paige Marquez, Linda Mattocks, Fatima Mili, Elaine Miller, Matthew Oster, Kadam Patel, Tracy Powell, Pragati Prasad, Nicole Reisman, Heather Scobie, David Shay, Jamila Shields, Christopher Taylor, Megan Wallace, CDC COVID-19 Response Team; Karen Broder, Allison Lale, Isaac See, Clinical Immunization Safety Assessment Project; Eric Weintraub, Kristin Goddard, Vaccine Safety Datalink; Rositsa Dimova, Craig Zinderman, Center for Biologics Evaluation and Research, Food and Drug Administration. Voting members of the Advisory Committee on Immunization Practices: Kevin Ault, University of Kansas Medical Center; Lynn Bahta, Minnesota Department of Health; Henry Bernstein, Zucker School of Medicine at Hofstra/Northwell Cohen Children's Medical Center; Beth Bell, University of Washington, Seattle, Washington; Wilbur Chen, University of Maryland School of Medicine; Sharon E. Frey, Saint Louis University Medical School; Camille Kotton, Harvard Medical School; Sarah Long, Drexel University College of Medicine; Katherine Poehling, Wake Forest School of Medicine; Pablo J. Sánchez, The Research Institute at Nationwide Children's Hospital. Members of the Advisory Committee on Immunization Practices COVID-19 Vaccines Work Group: Edward Belongia, Center for Clinical Epidemiology & Population Health, Marshfield Clinic Research Institute; Dayna Bowen Matthew, George Washington University Law School; Oliver Brooks, National Medical Association; Jillian Doss-Walker, Indian Health Service; Marci Drees, Society for Healthcare Epidemiology of America; Jeffrey Duchin, Infectious Diseases Society of America; Kathy Kinlaw, Center for Ethics, Emory University; Doran Fink, Food and Drug Administration; Sandra Fryhofer, American Medical Association; Jason M. Goldman, American College of Physicians; Michael Hogue, American Pharmacists Association; Denise Jamieson, American College of Obstetricians and Gynecologists; Jeffery Kelman, Centers for Medicare & Medicaid Services; David Kim, U.S. Department of Health and Human Services; Susan Lett, Council of State and Territorial Epidemiologists; Kendra McMillan, American Nurses Association; Kathleen Neuzil, Center for Vaccine Development and Global Health, University of Maryland School of Medicine; Sean O'Leary, American Academy of Pediatrics; Christine Oshansky, Biomedical Advanced Research and Development Authority; Stanley Perlman, Department of Microbiology and Immunology, University of Iowa; Marcus Plescia, Association of State and Territorial Health Officials; Chris Roberts, National Institutes of Health; William Schaffner, National Foundation for Infectious Diseases; Kenneth Schmader, American Geriatrics Society; Bryan Schumacher, Department of Defense; Rob Schechter, Association of Immunization Managers; Jonathan Temte, American Academy of Family Physicians; Peter Szilagyi, University of California, Los Angeles; Matthew Tunis, National Advisory Committee on Immunization Secretariat, Public Health Agency of Canada; Thomas Weiser, Indian Health Service; Matt Zahn, National Association of County and City Health Officials; Rachel Zhang, Food and Drug Administration. Members of the Advisory Committee on Immunization Practices COVID-19 Vaccines Safety Technical Work Group: Robert Hopkins, National Vaccine Advisory Committee; Kathryn Edwards, Vanderbilt University School of Medicine; Lisa Jackson, Kaiser Permanente Washington Health Research Institute; Jennifer Nelson: Kaiser Permanente Washington Health Research Institute; Laura Riley, American College of Obstetricians and Gynecologists; Patricia Whitley-Williams, National Medical Association; Tatiana Beresnev, National Institutes of Health; Karen Farizo, Food and Drug Administration; Hui Lee Wong, Food and Drug Administration; Judith Steinberg, U.S. Department of Health and Human Services; Matthew Clark, Indian Health Service; Mary Rubin, Health Resources & Services Administration; Fran Cunningham, Veterans Administration; Limone Collins, Department of Defense.
1CDC COVID-19 Response Team; 2Epidemic Intelligence Service, CDC; 3Vanderbilt University School of Medicine, Nashville, Tennessee; 4Food and Drug Administration, Silver Spring, Maryland; 5Division of Research, Kaiser Permanente Northern California, Oakland, California; 6Marshfield Clinic Research Institute, Marshfield, Wisconsin; 7Franny Strong Foundation, West Bloomfield, Michigan; 8Arkansas Department of Health; 9Stanford University School of Medicine, Stanford, California; 10Institute for Health Research, Kaiser Permanente Colorado, Denver, Colorado.
All authors have completed and submitted the International Committee of Medical Journal Editors form for disclosure of potential conflicts of interest. Nicola P. Klein reports institutional research support from Pfizer, Sanofi Pasteur, Merck, GlaxoSmithKline, and Protein Science (now Sanofi Pasteur). No other potential conflicts of interest were disclosed.
References
- Oliver SE, Gargano JW, Marin M, et al. The Advisory Committee on Immunization Practices' interim recommendation for use of Pfizer-BioNTech COVID-19 vaccine—United States, December 2020. MMWR Morb Mortal Wkly Rep 2020;69:1922–4. https://doi.org/10.15585/mmwr.mm6950e2external icon PMID:33332292external icon
- Oliver SE, Gargano JW, Marin M, et al. The Advisory Committee on Immunization Practices' interim recommendation for use of Moderna COVID-19 vaccine—United States, December 2020. MMWR Morb Mortal Wkly Rep 2021;69:1653–6. https://doi.org/10.15585/mmwr.mm695152e1external icon PMID:33382675external icon
- Oliver SE, Gargano JW, Scobie H, et al. The Advisory Committee on Immunization Practices' interim recommendation for use of Janssen COVID-19 vaccine—United States, February 2021. MMWR Morb Mortal Wkly Rep 2021;70:329–32. https://doi.org/10.15585/mmwr.mm7009e4external icon PMID:33661860external icon
- CDC. COVID data tracker. COVID-19 vaccinations in the United States. Atlanta, GA: US Department of Health and Human Services, CDC; 2021. Accessed July 22, 2021. https://covid.cdc.gov/covid-data-tracker/#vaccinations
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- Gargano JW, Wallace M, Hadler SC, et al. Use of mRNA COVID-19 vaccine after reports of myocarditis among vaccine recipients: update from the Advisory Committee on Immunization Practices—United States, June 2021. MMWR Morb Mortal Wkly Rep 2021;70:977–82. https://doi.org/10.15585/mmwr.mm7027e2external icon PMID:34237049external icon
- Sejvar JJ, Baughman AL, Wise M, Morgan OW. Population incidence of Guillain-Barré syndrome: a systematic review and meta-analysis. Neuroepidemiology 2011;36:123–33. https://doi.org/10.1159/000324710external icon PMID:21422765external icon
- van den Berg B, Walgaard C, Drenthen J, Fokke C, Jacobs BC, van Doorn PA. Guillain-Barré syndrome: pathogenesis, diagnosis, treatment and prognosis. Nat Rev Neurol 2014;10:469–82. https://doi.org/10.1038/nrneurol.2014.121external icon PMID:25023340external icon
| Sex/Age group, yrs | GBS cases† | No. of doses administered | GBS cases per million vaccine doses administered |
|---|---|---|---|
| Females | |||
| 18–29 | 1 | 1,037,996 | 1.0 |
| 30–49 | 13 | 1,957,663 | 6.6 |
| 50–64 | 14 | 1,888,715 | 7.4 |
| ≥65 | 9 | 1,037,996 | 8.7 |
| Total females | 37 | 5,922,370 | 6.2 |
| Males | |||
| 18–29 | 3 | 1,258,963 | 2.4 |
| 30–49 | 18 | 2,407,430 | 7.5 |
| 50–64 | 33 | 2,115,411 | 15.6 |
| ≥65 | 7 | 932,764 | 7.5 |
| Total males | 61 | 6,714,598 | 9.1 |
| Total | 98 | 12,636,938 | 7.8 |
Abbreviations: GBS = Guillain-Barré syndrome; VAERS = Vaccine Adverse Events Reporting System.
* Unconfirmed cases reported to VAERS.
† 100 cases total were reported to VAERS during this period; the 98 displayed here occurred within 42 days of vaccination and had age and sex information available.
| Vaccine | Benefits: COVID-19 outcomes prevented | Harms: adverse events† | ||||
|---|---|---|---|---|---|---|
| Sex/Age group, yrs | Cases | Hospitalizations | ICU admissions | Deaths | GBS | TTS |
| Janssen (Johnson & Johnson) COVID-19 vaccine§ | ||||||
| Females | ||||||
| 18–29 | 8,900 | 700 | 50 | 5 | 1 | 4–5 |
| 30–49 | 10,100 | 900 | 140 | 20 | 6–7 | 8–10 |
| 50–64 | 12,100 | 1,600 | 350 | 120 | 7–8 | 3–4 |
| ≥65 | 29,000 | 5,900 | 1,250 | 840 | 8–10 | 0 |
| Males | ||||||
| 18–29 | 6,600 | 300 | 60 | 3 | 2 | 2–3 |
| 30–49 | 7,600 | 650 | 150 | 25 | 7–8 | 1–2 |
| 50–64 | 10,100 | 1,800 | 480 | 140 | 14–17 | 1–2 |
| ≥65 | 36,600 | 11,800 | 3,300 | 2,300 | 7–8 | 0 |
| mRNA (Pfizer-BioNTech or Moderna) COVID-19 vaccine ¶ | Myocarditis | |||||
| Females | ||||||
| 18–29 | 12,800 | 750 | 50 | 5 | 3–4 | |
| 30–49 | 14,600 | 950 | 140 | 20 | 1–2 | |
| 50–64 | 17,500 | 1,700 | 375 | 125 | 1 | |
| ≥65 | 32,000 | 6,200 | 1,300 | 900 | <1 | |
| Males | ||||||
| 18–29 | 9,600 | 300 | 60 | 3 | 22–27 | |
| 30–49 | 11,000 | 700 | 160 | 25 | 5–6 | |
| 50–64 | 14,700 | 1,900 | 500 | 150 | 1 | |
| ≥65 | 52,700 | 12,500 | 3,500 | 2,400 | 1 | |
Abbreviations: GBS = Guillain-Barré syndrome; ICU = intensive care unit; TTS = thrombosis with thrombocytopenia syndrome.
* Benefits and harms were calculated using case incidence and hospitalization data for the week ending June 19, 2021, and for harms using cases through June 30 (GBS and myocarditis) and through July 8 (TTS), projected for a 120-day period using methods described here: https://www.cdc.gov/vaccines/covid-19/info-by-product/janssen/risk-benefit-analysis.html
† Estimates for adverse events are based on an estimated risk of cases per million doses administered with a +/- 10% range.
§ Benefits and harms calculated per million doses of Janssen vaccine administered.
¶ Benefits and harms calculated per million second doses of mRNA (Pfizer-BioNTech and Moderna) vaccine administered.
Suggested citation for this article: Rosenblum HG, Hadler SC, Moulia D, et al. Use of COVID-19 Vaccines After Reports of Adverse Events Among Adult Recipients of Janssen (Johnson & Johnson) and mRNA COVID-19 Vaccines (Pfizer-BioNTech and Moderna): Update from the Advisory Committee on Immunization Practices — United States, July 2021. MMWR Morb Mortal Wkly Rep 2021;70:1094-1099. DOI: http://dx.doi.org/10.15585/mmwr.mm7032e4external icon.
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Can You Make Money Off Of Youtube By Covers#tts=0
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