How long is varicella contagious?

Short answer
Varicella is contagious from shortly before the rash appears until every blister has dried and formed a crust.
This answers one question. It is not a diagnosis and does not replace an assessment by a licensed doctor.
At a glance
- Contagiousness begins
- Shortly before the rash appears
- Contagiousness ends
- When all blisters are dry and crusted
How spread happens
The virus travels through the air during close contact and can also spread when fluid from a blister reaches another person. New spots may appear in waves, so some lesions can be crusted while others remain fresh. Fever and an itchy blistering rash commonly occur during this illness.
Reducing transmission
Stay away from school, work and close indoor contact while new fluid-filled blisters are appearing. Do not share towels, clothing or bedding, and wash hands after touching the rash. Contact a GP Consultation service before attending in person so the team can advise on arrival arrangements. A clinician may discuss Antiviral Treatment for people at increased risk.
When advice is urgent
Seek prompt advice for breathing problems, severe drowsiness, repeated vomiting, poor fluid intake, or skin that is becoming hot, swollen and painful. Contact a clinician quickly after exposure if the person is pregnant, very young, or has reduced immunity; do not wait for a rash before asking what to do.
Useful questions
Ask how to identify the final fresh blister, when normal activities can restart, how to protect vulnerable contacts, and whether Chickenpox Vaccination is suitable for someone without immunity.
Find care
General Clinics & Polyclinics in Abu Dhabi
That answer is general. If you want it applied to your own case, these are licensed general clinics & polyclinics listed in Abu Dhabi.
27 Ar Ruwwad St - Shakhbout City - MSH4 - Abu Dhabi - United Arab Emirates
Accepts: Daman, Thiqa, Cigna, MetLife +20 more
Al Ruwais, Al Dhafrah
Accepts: Daman, Thiqa, AXA, Cigna +16 more
Al Bahyah - Al Bahyah Old - Abu Dhabi - United Arab Emirates
Accepts: Daman, Thiqa, Cigna, Allianz Care +18 more
Abu Dhabi
Accepts: Daman, Thiqa, AXA, Cigna +27 more
Ordered by verification status and how complete each clinic's public record is, then alphabetically. This is a directory listing, not a ranking — Zavis does not rate or recommend providers.
A factual listing drawn from the DHA, DOH and MOHAP licence registers. It is not a referral, an endorsement, or advice that any of these providers is right for you.
Questions people ask
Can chickenpox spread before spots appear?
Yes. Transmission can occur shortly before the rash becomes visible.
Does a crusted blister still spread varicella?
The contagious period is considered over when every blister has dried and crusted, not when only some have changed.
Related
Related reading
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Medical disclaimer. This page is general health information, not medical advice, and it cannot diagnose you. Always consult a licensed healthcare provider about your own symptoms and treatment. In an emergency in the UAE, call 998 for an ambulance.