Side Effects After Covid Vaccination Likely Sign of Strong Immune Response, Studies Find

Multiple studies have found that people who experience side effects like fever and fatigue after Covid vaccination tend to have higher antibody levels and stronger immune protection.
Side effects are more common after the second dose of an mRNA vaccine from Pfizer or Moderna.
Experts say that a lack of side effects does not mean the vaccine is ineffective or failed to provoke an immune response.
The immune response prompted by the vaccine, not the side effects themselves, produces the antibodies that protect against Covid-19.
Doctors recommend getting vaccinated and boosted even if you had little reaction to previous shots.