Pfizer COVID-19 vaccine side effects

Known side effects:

Like all medicines, the Pfizer-BioNtech vaccine may cause side effects in some people. Most side effects are mild and don’t last long. They won’t stop you from having the second dose or going about your daily life.

Some side effects may temporarily affect your ability to drive or use machinery.

Common side effects:

In the clinical trials, common side effects were reported in every 1 in 10 to 1 in 100 people. These include:

  • pain or swelling at the injection site
  • feeling tired or fatigued
  • headache
  • muscle aches
  • chills
  • joint pain
  • fever
  • redness at the injection site
  • nausea

Uncommon side effects:

In the clinical trials, uncommon side effects were reported in every 1 in 100 to 1 in 1,000 people. These include:

  • enlarged lymph nodes
  • feeling unwell
  • pain in limb
  • insomnia
  • itching at injection site