What should you know about exposure to varicella?

Varicella is the virus that causes [Chickenpox](/conditions/chickenpox/). Exposure means you may have been close enough to an infected person to inhale the virus or contact infectious fluid, but it does not confirm that you will become ill. The clinician will ask when contact happened, whether the other person had a typical rash, and whether you have had chickenpox or [Chickenpox Vaccination](/treatments/preventive-care-and-vaccination/chickenpox-vaccination/).

Early illness can include [Fever](/symptoms/fever/) followed by an itchy rash that changes into fluid-filled [Skin Blisters](/symptoms/skin-blisters/). A later reactivation of the same virus can cause [Shingles](/conditions/shingles/), which is different from a new chickenpox infection.

Write down the exposure date, the type of contact, the person’s diagnosis if known, and your own vaccination or illness history. Contact a GP, maternity team, or other healthcare professional promptly, especially if you are pregnant or have a weakened immune system. Ask whether immunity testing is appropriate and whether you should avoid contact with vulnerable people while symptoms are being assessed.

Do not self-prescribe antiviral medicines or use a vaccine without advice. A clinician may discuss [Antiviral Treatment](/treatments/medical-dermatology/antiviral-therapy/) or arrange a [GP Consultation](/treatments/consultations-and-assessment/gp-consultation/). If itching develops, ask before using [Antihistamine Treatment](/treatments/medical-dermatology/oral-antihistamine-therapy/), particularly for a child or during pregnancy.

Seek urgent advice for a new widespread blistering rash, persistent fever, breathing problems, severe headache, confusion, marked drowsiness, or rapid deterioration. Phone ahead before entering a waiting room if chickenpox is possible. Prompt assessment helps protect people at higher risk and identifies complications that need treatment.

How significant was this exposure? Am I immune, or should I be tested? What symptoms should trigger a same-day call? Should I avoid work, school, or close contact? Which treatments are suitable for my age, pregnancy status, and other medical conditions?