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FDA NEWS RELEASE

FDA Issues Emergency Use Authorization for Third COVID-19
Vaccine
Action Advances Fight Against COVID-19, Follows Comprehensive Evaluation of Available
Safety, Effectiveness and Manufacturing Quality Information by FDA Career Scientists, Input
from External Experts
For Immediate Release:
February 27, 2021
Today, the U.S. Food and Drug Administration issued an emergency use authorization (EUA)
for the third vaccine for the prevention of coronavirus disease 2019 (COVID-19) caused by
severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The EUA allows the Janssen
COVID-19 Vaccine to be distributed in the U.S for use in individuals 18 years of age and older.
“The authorization of this vaccine expands the availability of vaccines, the best
medical prevention method for COVID-19, to help us in the fight against this
pandemic, which has claimed over half a million lives in the United States,” said
Acting FDA Commissioner Janet Woodcock, M.D. “The FDA, through our open
and transparent scientific review process, has now authorized three COVID-19
vaccines with the urgency called for during this pandemic, using the agency’s
rigorous standards for safety, effectiveness and manufacturing quality needed to
support emergency use authorization.”
The FDA has determined that the Janssen COVID-19 Vaccine has met the statutory criteria for
issuance of an EUA. The totality of the available data provides clear evidence that the Janssen
COVID-19 Vaccine may be effective in preventing COVID-19. The data also show that the
vaccine’s known and potential benefits outweigh its known and potential risks, supporting the
company’s request for the vaccine’s use in people 18 years of age and older. In making this
determination, the FDA can assure the public and medical community that it has conducted a
thorough evaluation of the available safety, effectiveness and manufacturing quality
information.
The Janssen COVID-19 Vaccine is manufactured using a specific type of virus called adenovirus
type 26 (Ad26). The vaccine uses Ad26 to deliver a piece of the DNA, or genetic material, that is
used to make the distinctive “spike” protein of the SARS-CoV-2 virus. While adenoviruses are a
group of viruses that are relatively common, Ad26, which can cause cold symptoms and pink
eye, has been modified for the vaccine so that it cannot replicate in the human body to cause

illness. After a person receives this vaccine, the body can temporarily make the spike protein,
which does not cause disease, but triggers the immune system to learn to react defensively,
producing an immune response against SARS-CoV-2.
“After a thorough analysis of the data, the FDA’s scientists and physicians have
determined that the vaccine meets the FDA’s expectations for safety and
effectiveness appropriate for the authorization of a vaccine for emergency use,”
said Peter Marks, M.D., Ph.D., director of the FDA’s Center for Biologics
Evaluation and Research. “With today’s authorization, we are adding another
vaccine in our medical toolbox to fight this virus. At the same time, the American
people can be assured of the FDA’s unwavering commitment to public health
through our comprehensive and rigorous evaluation of the data submitted for
vaccines to prevent COVID-19.”
FDA Evaluation of Available Safety Data
The Janssen COVID-19 Vaccine is administered as a single dose. The available safety data to
support the EUA include an analysis of 43,783 participants enrolled in an ongoing randomized,
placebo-controlled study being conducted in South Africa, certain countries in South America,
Mexico, and the U.S. The participants, 21,895 of whom received the vaccine and 21,888 of
whom received saline placebo, were followed for a median of eight weeks after vaccination. The
most commonly reported side effects were pain at the injection site, headache, fatigue, muscle
aches and nausea. Most of these side effects were mild to moderate in severity and lasted 1-2
days.
As part of the authorization, the FDA notes that it is mandatory for Janssen Biotech Inc. and
vaccination providers to report the following to the Vaccine Adverse Event Reporting System
(VAERS) for Janssen COVID-19 Vaccine: serious adverse events, cases of Multisystem
Inflammatory Syndrome and cases of COVID-19 that result in hospitalization or death.
It is also mandatory for vaccination providers to report all vaccine administration errors to
VAERS for which they become aware and for Janssen Biotech Inc. to include a summary and
analysis of all identified vaccine administration errors in monthly safety reports submitted to
the FDA.
FDA Evaluation of Available Effectiveness Data
The effectiveness data to support the EUA include an analysis of 39,321 participants in the
ongoing randomized, placebo-controlled study being conducted in South Africa, certain
countries in South America, Mexico, and the U.S. who did not have evidence of SARS-CoV-2
infection prior to receiving the vaccine. Among these participants, 19,630 received the vaccine
and 19,691 received saline placebo. Overall, the vaccine was approximately 67% effective in

preventing moderate to severe/critical COVID-19 occurring at least 14 days after vaccination
and 66% effective in preventing moderate to severe/critical COVID-19 occurring at least 28 days
after vaccination.
Additionally, the vaccine was approximately 77% effective in preventing severe/critical COVID19 occurring at least 14 days after vaccination and 85% effective in preventing severe/critical
COVID-19 occurring at least 28 days after vaccination.
There were 116 cases of COVID-19 in the vaccine group that occurred at least 14 days after
vaccination, and 348 cases of COVID-19 in the placebo group during this time period. There
were 66 cases of COVID-19 in the vaccine group that occurred at least 28 days after vaccination
and 193 cases of COVID-19 in the placebo group during this time period. Starting 14 days after
vaccination, there were 14 severe/critical cases in the vaccinated group versus 60 in the placebo
group, and starting 28 days after vaccination, there were 5 severe/critical in the vaccine group
versus 34 cases in the placebo group.
At this time, data are not available to determine how long the vaccine will provide protection,
nor is there evidence that the vaccine prevents transmission of SARS-CoV-2 from person to
person.
The EUA Process
On the basis of the determination by the Secretary of the Department of Health and Human
Services on Feb. 4, 2020, that there is a public health emergency that has a significant potential
to affect national security or the health and security of United States citizens living abroad, and
issued declarations that circumstances exist justifying the authorization of emergency use of
unapproved products, the FDA may issue an EUA to allow unapproved medical products or
unapproved uses of approved medical products to be used in an emergency to diagnose, treat, or
prevent COVID-19 when there are no adequate, approved, and available alternatives.
The issuance of an EUA is different than an FDA approval (licensure) of a vaccine, in that a
vaccine available under an EUA is not approved. In determining whether to issue an EUA for a
product, the FDA evaluates the available evidence to determine whether the product may be
effective and also assesses any known or potential risks and any known or potential benefits If
the product meets the effectiveness standard and the benefit-risk assessment is favorable, the
product is made available during the emergency. Once a manufacturer submits an EUA request
for a COVID-19 vaccine to the FDA, the agency then evaluates the request and determines
whether the relevant statutory criteria are met, taking into account the totality of the scientific
evidence about the vaccine that is available to the FDA.
The EUA also requires that fact sheets that provide important information, including dosing
instructions, and information about the benefits and risks of the Janssen COVID-19 Vaccine, be
made available to vaccination providers and vaccine recipients.

Janssen Biotech Inc. has submitted a pharmacovigilance plan to the FDA describing its
commitment to monitor the safety of Janssen COVID-19 Vaccine. The pharmacovigilance plan
includes a plan to complete longer-term safety follow-up for participants enrolled in ongoing
clinical trials. The pharmacovigilance plan also includes other activities aimed at monitoring the
safety profile of the Janssen COVID-19 Vaccine and ensuring that any safety concerns are
identified and evaluated in a timely manner.
The FDA also expects manufacturers whose COVID-19 vaccines are authorized under an EUA to
continue their clinical trials to obtain additional safety and effectiveness information and pursue
approval (licensure).
The EUA for the Janssen COVID-19 Vaccine was issued to Janssen Biotech Inc., a Janssen
Pharmaceutical Company of Johnson & Johnson. The authorization will be effective until the
declaration that circumstances exist justifying the authorization of the emergency use of drugs
and biologics for prevention and treatment of COVID-19 is terminated. The EUA for Janssen
COVID-19 Vaccine may be revised or revoked if it is determined the EUA no longer meets the
statutory criteria for issuance.

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Inquiries
Media:
 FDA O ce of Media Affairs (mailto:fdaoma@fda.hhs.gov)
 301-796-4540
Consumer:
 888-INFO-FDA

Related Information
Janssen COVID-19 Vaccine EUA Letter of Authorization
(https://www.fda.gov/media/146303/download)
Janssen COVID-19 Vaccine EUA Fact Sheet for Healthcare Providers
(https://www.fda.gov/media/146304/download)

Janssen COVID-19 EUA Fact Sheet for Recipients and Caregivers
(https://www.fda.gov/media/146305/download)
COVID-19 Vaccines (https://www.fda.gov/emergency-preparedness-andresponse/coronavirus-disease-2019-covid-19/covid-19-vaccines)
Emergency Use Authorization for Vaccines Explained (/vaccines-bloodbiologics/vaccines/emergency-use-authorization-vaccines-explained)
Emergency Use Authorization for Vaccines to Prevent COVID-19; Guidance for Industry
(/regulatory-information/search-fda-guidance-documents/emergency-use-authorizationvaccines-prevent-covid-19)
Development and Licensure of Vaccines to Prevent COVID-19; Guidance for Industry
(/regulatory-information/search-fda-guidance-documents/development-and-licensurevaccines-prevent-covid-19)

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