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After being vaccinated for COVID-19, how long before I will be immune to the disease?

It typically takes a few weeks for the body to build immunity after vaccination. That means it's possible a person could be infected with the virus that causes COVID-19 just before or just after vaccination and still get sick. This is because the vaccine has not had enough time to provide protection.

People are considered fully vaccinated:

  • 14 days after the second dose if given a two-dose vaccine (Pfizer, Moderna).
  • 14 days after the one dose if given a one dose vaccine (Johnson & Johnson).
  • Some activities are safer than others - even after being fully vaccinated. Individuals, especially those who are immunocompromised, should weigh the risks before participating in activities.
  • At this time, a booster dose is not required to be considered fully vaccinated, but is recommended to be up to date an impacts quarantine and isolation. Boosters also help provide better protection from severe illness.