Some cases of measles can be mild, but up to half of infected children may need medical attention, said Dr. David Sugerman, who leads the measles team at the Centers for Disease Control and Prevention.
Measles is among the most contagious infections, and the virus can linger in the air for up to two hours. It is so contagious that if one person has it, up to 90 percent of the people close to him or her will also become infected if they are not protected, Dr. Sugerman said.
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