#norovirus

#norovirus

By the numbers: Cases of norovirus have doubled over the last few weeks, according to new data from the Centers for Disease Control and Prevention. About 14% of tests for norovirus came back positive during the week of Nov. 15, double the roughly 7% positivity three months ago, the CDC data show. Test positivity, though imperfect, generally helps health officials understand how many people are confirmed to have an illness when it is suspected.