Missing information: Most 10-year-olds have antibodies to the most common viruses that cause HFMD, but he could have spread it if he didn't wash his hands well after changing his brother's diaper or helping him wipe his nose or bum before playing with your kids. If he, too, developed symptoms of HFMD 3-6 days after his visit, he could have shed the virus by sneezing or coughing. That's what you need to know.
Answered 11/27/2017
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