COVID Vaccine Booster: Everything You Need to Know
Do You Need a COVID-19 Booster Shot?
Most people who are fully vaccinated against the coronavirus are relatively well-protected from serious illness and death from COVID-19.
But even highly effective vaccines often become less so over time. Early research on vaccines that use mRNA to protect you from the coronavirus, like those from Pfizer and Moderna, suggest that they eventually lose some of their power against infection and serious illness, no matter the variant of the virus (like Alpha, Beta, or Delta). Getting another shot several months after the first round, called a “booster shot,” can help supercharge the vaccine’s effectiveness.
The CDC and FDA both recommend getting a COVID-19 booster shot if you’re eligible.
Booster's Pfizer and Moderna
Anyone who got the Moderna COVID-19 vaccine at least 6 months ago should get a new booster shot if they're 18 years old or older.
For those who got the Pfizer-BioNTech vaccine, you’re eligible for a booster shot 5 months after your first two doses of the vaccine. The CDC recommends only the Pfizer booster shot for adolescents between 12 to 17 years old. They also should receive the booster shot 5 months after their initial vaccination series.
Recently, the CDC said there’s a preference for mRNA (Pfizer and Moderna) COVID-19 vaccines over the Johnson & Johnson COVID-19 vaccine. This decision was based on information from the Advisory Committee on Immunization Practices (ACIP). The information discussed vaccine safety, vaccine effectiveness, rare adverse side effects, and U.S. vaccine supply.
While it’s best to get a booster shot from either Pfizer or Moderna, any booster is better than none. If you can only get the Johnson & Johnson booster, you should take it.
Boosters for Johnson & Johnson Vaccine
If you got the Johnson & Johnson vaccine, you should get a booster if you’re 18 or older and got vaccinated 2 or more months ago.
Can You Mix and Match Booster Shots?
Yes. For example, if you got the Moderna vaccine and you prefer to get a Pfizer booster shot, that is perfectly OK, according to the CDC. You can decide if you want to stick with a booster that matches your initial vaccine, or if you want to get one of the other two. (The three vaccines available in the U.S. are Pfizer, Moderna, and Johnson & Johnson.)
Some research suggests mixing vaccines in this way gives as much and perhaps even more protection against COVID-19 infection.