People age 18 years and older who received Pfizer-BioNTech or Moderna COVID-19 vaccines may now get a booster.
Learn More About COVID-19 Booster doses
Last updated: November 22, 2021 - 10:30am
People with COVID-19 have reported a wide range of symptoms – from mild symptoms to severe illness. Symptoms may appear 2-14 days after exposure to the virus. If you have a fever, cough, or other symptoms, you might have COVID-19.
Anyone infected with COVID-19 can spread it, even if they do not have symptoms.
Viruses constantly change through mutation, and new variants of a virus are expected to occur. Sometimes new variants emerge and disappear. Other times, new variants persist. All variants of the virus that causes COVID-19 are being tracked in the United States and globally during this pandemic.
Top Things You Need to Know:
COVID-19 vaccines are effective at preventing infection, serious illness, and death. Most people who get COVID-19 are unvaccinated. However, since vaccines are not 100% effective at preventing infection, some people who are fully vaccinated will still get COVID-19. An infection of a fully vaccinated person is referred to as a “vaccine breakthrough infection.”
What We Know about Vaccine Breakthrough Infections: