CDC Data: Norovirus Cases on the Rise in the US, Namely the Northeast

Norovirus has been on the rise across the northeastern United States over the past month or so, according to recent data provided by the U.S. Centers for Disease Control and Prevention (CDC).

More than 13 percent of tests for the virus, which is associated with vomiting and diarrhea, came back positive as of mid-February, the most recent CDC data revealed. That’s the highest level in any region of the country.

Nationwide, 12 percent of tests for norovirus have come back positive during the same period, the data show. In mid-January, about 10 percent of tests came back positive.

That’s lower than the 15 percent positivity rate from a year ago, and it’s also lower than the 14 percent positivity rate in 2022, according to the data.

“Participating U.S. laboratories report the total number of norovirus tests performed that week, and the number of those tests that were positive to CDC weekly,” the agency wrote on its website. “Because reporting delays may be expected for some laboratories, data shown for the more recent weeks may be less complete than others.”

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