Vaccination is the best protection against hepatitis A and its complications. Hepatitis A is a liver infection caused by a virus (hepatitis A virus).

The vaccine

Vaccination is the best protection against hepatitis A and its complications. The vaccine is indicated for anyone who wants to reduce their risk of catching hepatitis A. Several doses of vaccine are required to ensure the best possible protection.

Symptoms after vaccination

Some symptoms may be caused by the vaccine (e.g. redness at the injection site). Other problems may occur by chance and are not related to the vaccine may occur by chance (e.g. cold, gastro, headache).

Hepatitis A vaccine is safe. Most reactions are harmless and do not last long.

The Nature and Frequency of Possible Reactions to Vaccine
FrequencyPossible reactions to the vaccine

In most cases
(more than 50% of people)

  • Pain at the injection site

Very often
(less than 50% of people)

  • Redness and swelling at the infection site
  • Headache, muscle soreness, fatigue
  • Irritability in children aged 12 to 23 months

(less than 10% of people)

  • Skin rash in children aged 12 to 23 months
  • Fever, gastro intestinal upsets, respiratory symptoms

Note: Reactions at the injection site are less common among children.

What to Do after Vaccination

Tips to follow immediately following vaccination

Wait 15 minutes before leaving premises where vaccine is received. If an allergic reaction occurs, the symptoms will appear a few minutes after the vaccination.

If you feel side effects, immediately inform the person giving the vaccine. That person will be able to treat you immediately.

Tips to follow at home

If you experience redness, pain or swelling at the injection site, apply a cold, damp compress on it.

Use medication for fever or discomfort if needed.

When to Seek Medical Help

See a doctor if one of the following applies to you:

  • You experience serious and unusual symptoms
  • Your symptoms get worse instead of improving
  • Your symptoms last over 48 hours