COVID-19 Vaccines

Undecided about which vaccine to get? Check out our vaccine information grid, which provides you with side-by-side information about each of the three COVID-19 vaccines currently authorized for emergency use by the FDA.

 
Pfizer-BioNtech
Moderna
Johnson & Johnson
(Janssen)
Who can get it?
Ages 12+
Ages 18+
Ages 18+
How many doses?
2 Doses
2 Doses
1 Dose
Effectiveness
(Against severe illness, hospitalization, and death from COVID-19)
More than 99%
More than 99%
More than 99%
Time to Immunity
(Against severe illness and death from COVID-19)
2 weeks after 2nd dose
2 weeks after 2nd dose
2 weeks after dose
Vaccine Type
mRNA
mRNA
Viral Vector
Common side effects
  • Pain at the injection site
  • Fatigue
  • Headache
  • Muscle and joint pain
  • Chills
  • Mild fever
Please read the CDC Fact Sheet for a full list of side effects reported for this vaccine.
  • Pain at the injection site
  • Fatigue
  • Headache
  • Muscle and joint pain
  • Chills
  • Mild fever
Please read the CDC Fact Sheet for a full list of side effects reported for this vaccine.
  • Pain at the injection site
  • Fatigue
  • Headache
  • Muscle and joint pain
  • Chills
  • Mild fever
Please read the CDC Fact Sheet for a full list of side effects reported for this vaccine.
Tested against new variants?
No
No
Yes
Ingredients
Please read the CDC Fact Sheet for this vaccine for a list of its ingredients.
Please read the CDC Fact Sheet for this vaccine for a list of its ingredients.
Please read the CDC Fact Sheet for this vaccine for a list of its ingredients.
Who should talk to their doctor before getting the vaccine?
Those with a history of severe allergic reaction (anaphylaxis) to any of the ingredients (e.g. polyethylene glycol) in the vaccine, or those who had a severe reaction after the 1st dose.
Those with a history of severe allergic reaction (anaphylaxis) to any of the ingredients (e.g. polyethylene glycol) in the vaccine, or those who had a severe reaction after the 1st dose.
Those with a history of severe allergic reaction (anaphylaxis) to any of the ingredients (e.g. polysorbate) in the vaccine.