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About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
In inpatient settings, adverse drug events account for an estimated one in three of all hospital adverse events. They affect approximately 2 million hospital stays every year, and prolong hospital stays by between one and five days.