You might have some side effects from the vaccine. For a few days you might feel like you have a cold or flu. You may feel:

  • Pain in the arm where you got the shot
  • Tired
  • Aches in muscles or joints
  • A headache
  • Chills
  • Feverish

The side effects happen because your body is building protection against COVID-19. It is a sign the vaccine is working. You cannot pass your side effect symptoms to other people. Some people have more side effects after their second dose, or none at all. Most people feel better after a few days.