The Janssen COVID‑19 Vaccine will be given to you as an injection into the muscle.
Primary Vaccination: The Janssen COVID‑19 Vaccine is administered as a single dose.
- A single booster dose of the Janssen COVID‑19 Vaccine may be administered at least 2 months after primary vaccination with the Janssen COVID‑19 Vaccine
- A single booster dose of the Janssen COVID‑19 Vaccine may be administered to eligible individuals who have completed primary vaccination with a different authorized or approved COVID‑19 vaccine. Please check
with your healthcare provider regarding eligibility for and timing of the booster dose
The Janssen COVID‑19 Vaccine has been shown to prevent COVID‑19. The duration of protection against COVID‑19 is currently unknown.
Side effects that have been reported with the Janssen COVID-19 Vaccine include:
- Injection site reactions: pain, redness of the skin and swelling
- General side effects: headache, feeling very tired, muscle aches, nausea, and fever
- Swollen lymph nodes
- Blood clots
- Unusual feeling in the skin (such as tingling or a crawling feeling) (paresthesia), decreased feeling or sensitivity, especially in the skin (hypoesthesia)
- Persistent ringing in the ears (tinnitus)
- Diarrhea, vomiting
Severe Allergic Reactions
There is a remote chance that the Janssen COVID-19 Vaccine could cause a severe allergic reaction. A severe allergic reaction would usually occur within a few minutes to one hour after getting a dose of the Janssen COVID-19
Vaccine. For this reason, your vaccination provider may ask you to stay at the place where you received your vaccine for monitoring after vaccination. Signs of a severe allergic reaction can include:
- Difficulty breathing
- Swelling of your face and throat,
- A fast heartbeat
- A bad rash all over your body
- Dizziness and weakness
Blood Clots with Low Levels of Platelets
Blood clots involving blood vessels in the brain, lungs, abdomen, and legs along with low levels of platelets (blood cells that help your body stop bleeding), have occurred in some people who have received the Janssen COVID-19 Vaccine. In people who developed these blood clots and low levels of platelets, symptoms began approximately one to two weeks after vaccination. Blood clots with low levels of platelets following the Janssen COVID-19 Vaccine have been reported in males and females, across a wide age range of individuals 18 years and older; reporting has been highest in females ages 30 through 49 years (about 1 case for every 100,000 vaccine doses administered), and about 1 out of every 7 cases has been fatal. You should seek medical attention right away if you have any of the following symptoms after receiving the Janssen COVID-19 Vaccine:
- Shortness of breath
- Chest pain
- Leg swelling
- Persistent abdominal pain
- Severe or persistent headaches or blurred vision
- Easy bruising or tiny blood spots under the skin beyond the site of the injection
Immune Thrombocytopenia (ITP)
Immune Thrombocytopenia (ITP) is a disorder that can cause easy or excessive bruising and bleeding due to very low levels of platelets. ITP has occurred in some people who have received the Janssen COVID-19 Vaccine. In most of these people, symptoms began within 42 days following receipt of the Janssen COVID-19 Vaccine. The chance of having this occur is very low. If you have ever had a diagnosis of ITP, talk to your vaccination provider before you get the Janssen COVID-19 Vaccine. You should seek medical attention right away if you develop any of the following symptoms after receiving the Janssen COVID-19 Vaccine:
- Easy or excessive bruising or tiny blood spots under the skin beyond the site of the injection
- Unusual or excessive bleeding
Guillain Barré Syndrome
Guillain Barré syndrome (a neurological disorder in which the body’s immune system damages nerve cells, causing muscle weakness and sometimes paralysis) has occurred in some people who have received the Janssen COVID-19 Vaccine.
In most of these people, symptoms began within 42 days following receipt of the Janssen COVID-19 Vaccine. The chance of having this occur is very low. You should seek medical attention right away if you develop any of the
following symptoms after receiving the Janssen COVID-19 Vaccine:
- Weakness or tingling sensations, especially in the legs or arms, that’s worsening and spreading to other parts of the body
- Difficulty walking
- Difficulty with facial movements, including speaking, chewing, or swallowing
- Double vision or inability to move eyes
- Difficulty with bladder control or bowel function
These may not be all the possible side effects of the Janssen COVID-19 Vaccine. Serious and unexpected effects may occur. The Janssen COVID-19 Vaccine is still being studied in clinical trials.
For more information on the CDC recommendation for use of Johnson & Johnson's Janssen COVID-19 Vaccine, please see the latest update from the CDC.
If you experience a severe allergic reaction, call 9‑1‑1, or go to the nearest hospital.
Call the vaccination provider or your healthcare provider if you have any side effects that bother you or do not go away.
Report vaccine side effects to FDA/CDC Vaccine Adverse Event Reporting System (VAERS). The VAERS toll-free number is 1-800-822-7967
1-800-822-7967 or report online to https://vaers.hhs.gov/reportevent.html.
Please include "Janssen COVID‑19 Vaccine EUA" in the first line of box #18 of the report form.
In addition, you can report side effects to Janssen Biotech, Inc. at the contact information provided below.
US Toll Free: 1-800-565-40081-800-565-4008
US Toll: 1-908-455-99221-908-455-9922
You may also be given an option to enroll in v-safe. V-safe is a new voluntary smartphone-based tool that uses text messaging and web surveys to check in with people who have been vaccinated
to identify potential side effects after COVID-19 vaccination. V-safe asks questions that help CDC monitor the safety of COVID-19 vaccines. V-safe also provides live telephone follow-up
by CDC if participants report a significant health impact following COVID-19 vaccination. For more information on how to sign up, visit: www.cdc.gov/vsafe
No. The Janssen COVID‑19 Vaccine does not contain SARS-CoV-2 and cannot give you COVID‑19.
The FDA has authorized the emergency use of the Janssen COVID‑19 Vaccine to prevent COVID‑19 in individuals 18 years of age and older under an Emergency Use Authorization (EUA).
You should not get the Janssen COVID‑19 Vaccine if you:
- Had a severe allergic reaction after a previous dose of this vaccine
- Had a severe allergic reaction to any ingredient of this vaccine
- Had a blood clot along with a low level of platelets (blood cells that help your body stop bleeding) following Janssen COVID-19 Vaccine or following AstraZeneca’s COVID-19 vaccine (not authorized or approved in the United States)
Data have not yet been submitted to FDA on administration of the Janssen COVID-19 Vaccine at the same time as other vaccines. If you are considering receiving the Janssen COVID-19 Vaccine with other vaccines, discuss your options
with your healthcare provider.
No. At this time, the provider cannot charge you for a vaccine dose and you cannot be charged an out-of-pocket vaccine administration fee or any other fee if only receiving a COVID-19 vaccination. However, vaccination providers
may seek appropriate reimbursement from a program or plan that covers COVID-19 vaccine administration fees for the vaccine recipient (private insurance, Medicare, Medicaid, HRSA COVID-19 Uninsured Program for non-insured