The Janssen COVID-19 Vaccine: How It's Designed

The Janssen COVID‑19 Vaccine: How It’s Designed

The Janssen COVID-19 Vaccine has not been approved or licensed by the U.S. Food and Drug Administration (FDA), but has been authorized by FDA through an Emergency Use Authorization (EUA) for active immunization to prevent Coronavirus Disease 2019 (COVID-19) in individuals 18 years of age and older. The emergency use of this product is authorized only for the duration of the declaration that circumstances exist justifying the authorization of the emergency use of the medical product under Section 564(b)(1) of the FD&C Act, unless the declaration is terminated or authorization revoked sooner.

Mechanism of Action

The Janssen COVID‑19 Vaccine is composed of a recombinant, replication-incompetent human adenovirus type 26 vector that, after entering human cells, expresses the SARS-CoV-2 spike (S) antigen without virus propagation. An immune response elicited to the S antigen protects against COVID‑19.

Replication-Incompetent Viral Vector Technology1,2

The viral vector used in the Janssen COVID‑19 Vaccine is based on a naturally occurring, low-prevalence human adenovirus. Adenoviruses are known to cause common cold–like symptoms. The deletion of a specific gene renders the adenovirus unable to replicate within humans, transforming it into a delivery vehicle for the genetic material encoding the spike protein of SARS-CoV-2. In this form, the vaccine cannot cause COVID‑19 or adenoviral disease.

Delivery of S Antigen DNA

The viral vector shuttles the gene encoding the S antigen into a human cell.

Delivery of S Antigen DNA Chart

S Antigen Production

Once inside a cell, the cell’s machinery uses this gene to produce the S antigen and display it on the cell’s surface.

S Antigen Production Chart

Immune Response to S Antigen

The displayed S antigen triggers an immune response that will help prepare the body to respond to future exposure to SARS-CoV-2.

Immune Response to S Antigen Chart
VIRAL VECTOR TECHNOLOGY FLASH CARD
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COVID-19=coronavirus disease 2019; EUA=Emergency Use Authorization; FD&C Act=Federal Food, Drug, and Cosmetic Act; SARS-CoV-2=severe acute respiratory syndrome coronavirus 2.

Important safety information

CONTRAINDICATIONS

Do not administer the Janssen COVID-19 Vaccine to individuals with a known history of a severe allergic reaction (e.g., anaphylaxis) to any component of the Janssen COVID-19 Vaccine.

WARNINGS AND PRECAUTIONS

Monitor Janssen COVID-19 Vaccine recipients for the occurrence of immediate adverse reactions according to the Centers for Disease Control and Prevention guidelines (https://www.cdc.gov/vaccines/covid-19/clinical-considerations/managing-anaphylaxis.html).

ADVERSE REACTIONS

Adverse reactions reported in a clinical trial following administration of the Janssen COVID-19 Vaccine include injection site pain, headache, fatigue, myalgia, nausea, fever, injection site erythema and injection site swelling. In clinical studies, severe allergic reactions, including anaphylaxis, have been reported following the administration of the Janssen COVID-19 Vaccine.

Additional adverse reactions, some of which may be serious, may become apparent with more widespread use of the Janssen COVID-19 Vaccine.

Reporting Adverse Events and Vaccine Administration Error

The vaccination provider enrolled in the federal COVID-19 Vaccination Program is responsible for mandatory reporting of the listed events following Janssen COVID-19 Vaccine administration to the Vaccine Adverse Event Reporting System (VAERS):

Instructions for Reporting to VAERS

The vaccination provider enrolled in the federal COVID-19 Vaccination Program should complete and submit a VAERS form to FDA using one of the following methods below. Reports should include the words “Janssen COVID-19 Vaccine EUA” in the description section of the report as the first line.

Report adverse events to Janssen Biotech, Inc. by calling 1-800-565-40081-800-565-4008 or provide a copy of the VAERS form by faxing 1-215-293-9955.

PREGNANCY AND LACTATION

DOSING AND SCHEDULE

The Janssen COVID-19 Vaccine is administered intramuscularly as a single dose (0.5 mL).

There are no data available on the use of the Janssen COVID-19 Vaccine to complete a vaccination series initiated with another COVID-19 vaccine.

Please read Emergency Use Authorization (EUA) Fact Sheet for Healthcare Providers Administering Vaccine (Vaccination Providers) including full EUA Prescribing Information available at www.JanssenCOVID19Vaccine.com/EUA-factsheet.

cp-213942v1

Important safety information

CONTRAINDICATIONS

Do not administer the Janssen COVID-19 Vaccine to individuals with a known history of a severe allergic reaction (e.g., anaphylaxis) to any component of the Janssen COVID-19 Vaccine.

WARNINGS AND PRECAUTIONS

Monitor Janssen COVID-19 Vaccine recipients for the occurrence of immediate adverse reactions according to the Centers for Disease Control and Prevention guidelines (https://www.cdc.gov/vaccines/covid-19/clinical-considerations/managing-anaphylaxis.html).

ADVERSE REACTIONS

Adverse reactions reported in a clinical trial following administration of the Janssen COVID-19 Vaccine include injection site pain, headache, fatigue, myalgia, nausea, fever, injection site erythema and injection site swelling. In clinical studies, severe allergic reactions, including anaphylaxis, have been reported following the administration of the Janssen COVID-19 Vaccine.

Additional adverse reactions, some of which may be serious, may become apparent with more widespread use of the Janssen COVID-19 Vaccine.

Reporting Adverse Events and Vaccine Administration Error

The vaccination provider enrolled in the federal COVID-19 Vaccination Program is responsible for mandatory reporting of the listed events following Janssen COVID-19 Vaccine administration to the Vaccine Adverse Event Reporting System (VAERS):

Instructions for Reporting to VAERS

The vaccination provider enrolled in the federal COVID-19 Vaccination Program should complete and submit a VAERS form to FDA using one of the following methods below. Reports should include the words “Janssen COVID-19 Vaccine EUA” in the description section of the report as the first line.

Report adverse events to Janssen Biotech, Inc. by calling 1-800-565-40081-800-565-4008 or provide a copy of the VAERS form by faxing 1-215-293-9955.

PREGNANCY AND LACTATION

DOSING AND SCHEDULE

The Janssen COVID-19 Vaccine is administered intramuscularly as a single dose (0.5 mL).

There are no data available on the use of the Janssen COVID-19 Vaccine to complete a vaccination series initiated with another COVID-19 vaccine.

Please read Emergency Use Authorization (EUA) Fact Sheet for Healthcare Providers Administering Vaccine (Vaccination Providers) including full EUA Prescribing Information available at www.JanssenCOVID19Vaccine.com/EUA-factsheet.

cp-213942v1