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Is chicken pox infectious?

1 doctor weighed in

In brief: Chicken pox is infectious

Chicken pox is very infectious.
A child who has not yet had it before, and who comes into contact with an infected person, will almost certainly catch it. Children with chicken pox are infectious from about two days before to six days after the appearance of the rash, by which time the last crop of blisters should have crusted over.


The virus is spread either by direct contact with a person with active chicken pox or shingles, or by indirect contact with clothes or other articles infected with vesicle fluid, saliva, nasal discharge etc, or by airborne spread of small droplets of infected mucous or vesicle fluid. To prevent further spread of chicken pox children should be kept off school for six to seven days until all the blisters have crusted over. Shingles cannot be caught from chicken pox.

In brief: Chicken pox is infectious

Chicken pox is very infectious.
A child who has not yet had it before, and who comes into contact with an infected person, will almost certainly catch it. Children with chicken pox are infectious from about two days before to six days after the appearance of the rash, by which time the last crop of blisters should have crusted over.


The virus is spread either by direct contact with a person with active chicken pox or shingles, or by indirect contact with clothes or other articles infected with vesicle fluid, saliva, nasal discharge etc, or by airborne spread of small droplets of infected mucous or vesicle fluid. To prevent further spread of chicken pox children should be kept off school for six to seven days until all the blisters have crusted over. Shingles cannot be caught from chicken pox.
Quality HealthCare Team
Quality HealthCare Team
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