Wednesday, 7 October 2026
YHDP YHDP Preventive medicine information
and vaccination for everyone
Infectious diseases

Chickenpox (varicella)

Highly effective live vaccines: Varilrix, Varivax, Barycela.

Transmission

Through the respiratory tract by droplets and by direct contact with fluid from broken blisters.

Symptoms

Fever and a rash of clear blisters that turn cloudy, intense itching, appearing in several crops all over the body.

Complications

Skin infections leaving deep pitted scars, varicella pneumonia (10–30% fatal), encephalitis, Reye syndrome, shingles later in life.

People at high risk

Children, adults who have never had chickenpox, pregnant women (risk of congenital varicella in the baby).

Preventive vaccines