How long does varicella vaccine last?

The vaccine trains the immune system to recognise varicella, the virus that causes [Chickenpox](/conditions/chickenpox/). Protection is not measured by a simple expiry date printed for every person. It can be influenced by the doses received, age at vaccination, immune health and whether a person responds to the vaccine. Because this is a [Live Attenuated Vaccine](/materials/live-attenuated-vaccine/), a clinician may use different guidance for people with immune problems.

Store your vaccination record and tell future clinicians the dates and product if known. If your record is missing, ask whether the clinic can retrieve it or whether another assessment is useful; do not assume that an uncertain date means protection has ended. Before travel, pregnancy planning or immune-suppressing treatment, arrange a review early. The [Chickenpox Vaccination](/treatments/preventive-care-and-vaccination/chickenpox-vaccination/) page gives general context, while your clinician decides whether any further action is appropriate.

Contact a healthcare service if you develop a blistering rash after a possible exposure, particularly if you are pregnant or immunocompromised. Seek emergency care for breathing difficulty, confusion, collapse or swelling of the face or throat. Vaccination reduces risk but does not make every later rash or fever harmless, so severe symptoms should be assessed promptly.

Ask how your documented doses affect your current protection, whether your medical conditions alter vaccine guidance, and what to do after exposure. Ask whether future doses are recommended for your situation and how the decision should be recorded.