As they scrambled recently to trace the source of a salmonella outbreak that has sickened hundreds around the country, investigators from the Centers for Disease Control and Prevention successfully used a new tool for the first time — the shopper cards that millions of Americans swipe every time they buy groceries. With permission from the patients, investigators followed the trail of ...

WASHINGTON (Reuters) - About 16 percent of Americans between the ages of 14 and 49 are infected with genital herpes, making it one of the most common sexually transmitted diseases, U.S. health officials said on Tuesday. Black women had the highest rate of infection at 48 percent and women were nearly twice likely as men to be infected, according to ...

WASHINGTON (Reuters) - About 16 percent of Americans between the ages of 14 and 49 are infected with genital herpes, making it one of the most common sexually transmitted diseases, U.S. health officials said on Tuesday. Black women had the highest rate of infection at 48 percent and women were nearly twice likely as men to be infected, according to ...

CHICAGO (Reuters) - Inoculating children against flu protects more people of all ages in the larger community, probably because young people tend to spread viruses through physical play, Canadian researchers said on Tuesday. Researchers at McMaster University in Hamilton, Ontario found there were 61 percent fewer flu cases in isolated communities where children and adolescents received the seasonal influenza vaccine, compared ...