I only got one varicella vaccine: what now?

One recorded dose shows that you started vaccination, but it may not be the complete schedule recommended for your age or circumstances. The advice can differ for children, adults, people with weakened immune systems, and those who are pregnant or planning pregnancy.

The varicella vaccine is a live attenuated vaccine: it uses a weakened form of the virus to train immune recognition without causing typical chickenpox in most recipients. It does not treat an active chickenpox infection, and vaccination history is not the same as proof of current illness.

Find any clinic, school or workplace immunisation records and bring them to a doctor or vaccination service. Include the date and brand if known, previous chickenpox illness, allergies, medicines and conditions affecting immunity. Do not repeat a dose on your own; a clinician can check spacing, eligibility and whether another option is needed.

If you may have been exposed to chickenpox, contact a healthcare professional promptly, especially if you are pregnant or immunocompromised. Explain the exposure date and whether you have symptoms.

Seek medical advice urgently after exposure if you are pregnant, have a weakened immune system, or take immune-suppressing treatment. Get prompt care for a widespread blistering rash, breathing difficulty, severe headache, confusion or a rapidly worsening illness.

Ask: Do I need another varicella dose? Does my record show a complete schedule? Is vaccination suitable with my medicines or health conditions? How should I respond after exposure to chickenpox?