![]() ![]() If 100 people are sitting in a room together for several hours talking and one of them has chickenpox and the other 99 have never been infected with chickenpox or vaccinated with the chickenpox vaccine, about 85 of the remaining 99 will get chickenpox. ![]() How contagious is chickenpox?Ĭhickenpox is very contagious. Finally, a bacterium called Group A streptococcus, commonly known as "flesh-eating" bacteria, can enter through the skin during a varicella infection and cause severe, and sometimes fatal, disease. These birth defects include developmental delay and shortened or atrophied limbs. In addition, about 1 of every 50 women infected with varicella during their pregnancy will deliver children with birth defects. About 1 of every 1,000 children infected with varicella will develop severe pneumonia (infection of the lungs) or encephalitis (infection of the brain). However, chickenpox infections can have severe complications. ![]() As many as 300-500 blisters can occur during a single infection.Ĭhickenpox is usually a relatively benign infection. The rash of chickenpox begins as red bumps that turn into blisters that cover the entire body. It can spread in one of three ways: by coughing or sneezing, physical contact with broken blisters, or by virus particles from the blisters that are sprayed in the air. Chickenpox is an infection caused by the varicella virus, and it is highly contagious.
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