chickenpox

That makes it twice as infectious as the original strain and almost as contagious as the chickenpox.

Each sick person will infect an average of seven others, making it nearly as contagious as chickenpox.

What I did know was that everyone in my daughter’s house had been vaccinated against chickenpox and no one would touch three bumps burrowed under my boxwood bush of hair.

It took two decades for researchers to develop a vaccine for polio, in 1953, and even longer to get a chickenpox vaccine, in 1995.

For some viruses, such as the varicella-zoster virus that causes chickenpox, immunity can last for decades.

In January, Barbara Walters, 83, suffered from a rare case of chickenpox, leaving her View perch for six weeks.

Chickenpox is almost a harmless disease, but it is more infectious than even measles.

It causes an alarm but does not prove mortal, and is probably what we term the chickenpox.

This forms one of its distinguishing features when chickenpox is compared with smallpox.

The eruption appears about the same time in smallpox and not in successive crops, as in chickenpox.

Chickenpox is more commonly a disease of childhood; smallpox attacks all ages.