Johnson & Johnson Vaccine (J&J / Janssen)

General Information
Name: JNJ-78436735

Manufacturer: Janssen Pharmaceuticals Companies of Johnson & Johnson

Type of Vaccine: Viral Vector

Number of Shots: 1 shot

Booster Shot: At least 2 months after receiving your vaccine. You can get any of the COVID-19 vaccines authorized in the United States for your booster shot. People who developed thrombosis with thrombocytopenia syndrome after their initial Janssen vaccine should not receive a Janssen booster dose.

How Given: Shot in the muscle of the upper arm

Does NOT Contain: Eggs, preservatives, latex, metals
See Full List of Ingredients Below

Safety Data Summary
In clinical trials, side effects were common within 7 days of getting vaccinated and were mostly mild. Some people had side effects that affected their ability to do daily activities.
Side effects were more common in people 18–59 years old compared to people 60 years and older.
There is a plausible causal relationship between J&J/Janssen COVID-19 Vaccine and a rare and serious adverse event—blood clots with low platelets (thrombosis with thrombocytopenia syndrome, or TTS).
It occurs at a rate of about 7 per 1 million vaccinated women between 18 and 49 years old.
For women 50 years and older and men of all ages, this adverse event is even more rare.
Find the latest updates on J&J/Janssen COVID-19 Vaccine and blood clots with low platelets.
CDC will continue to provide updates as we learn more about the safety of the J&J/Janssen COVID-19 Vaccine in real-world conditions.11:28 PM

Type of Ingredient



A harmless version of a virus unrelated to the COVID-19 virus

Recombinant, replication-incompetent Ad26 vector, encoding a stabilized variant of the SARS-CoV-2 Spike (S) protein
Provides instructions the body uses to build a harmless piece of a protein from the virus that causes COVID-19. This protein causes an immune response that helps protect the body from getting sick with COVID-19 in the future.

Sugars, salts, acid, and acid stabilizer

Trisodium citrate dihydrate
Sodium chloride (basic table salt)
Citric acid monohydrate (closely related to lemon juice)
Ethanol (a type of alcohol)
Work together to help keep the vaccine molecules stable while the vaccine is manufactured, shipped, and stored until it is ready to be given to a vaccine recipient.

Who Should Get Vaccinated
Who Should NOT Get Vaccinated
  • If you have had a severe allergic reaction (anaphylaxis) or an immediate allergic reaction, even if it was not severe, to any ingredientexternal icon in the J&J/Janssen COVID-19 Vaccine (such as polysorbate), you should not get the J&J/Janssen COVID-19 Vaccine.
  • A severe allergic reaction is one that needs to be treated with epinephrine or EpiPen or with medical care. Learn about common side effects of COVID-19 vaccines and when to call a doctor.
  • An immediate allergic reaction means a reaction within 4 hours of exposure, including symptoms such as hives, swelling, or wheezing (respiratory distress).

If you aren’t able to get the J&J/Janssen COVID-19 Vaccine, you may still be able to get a different type of COVID-19 vaccine. Get more information for people with allergies.

Booster Doses

General information

  • 2-dose series for initial vaccination
  • mRNA vaccine
  • Available under emergency use authorization (EUA) for ages 18+

Learn more about boosters and additional doses below. If you’re eligible for an additional dose, it’s recommended you receive the same manufacturer as your primary series. For booster doses, the CDC allows eligible people to choose which COVID-19 vaccine they receive.

Moderna booster dose

Moderna additional dose