There’s no approved norovirus vaccine yet, but several companies are working on it.
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Every year, somewhere between 19 and 21 million Americans come down with gastroenteritis (aka “stomach flu”), most often caused by a group of pathogens called noroviruses. These infections lead to hundreds of thousands of ER visits and hospitalizations, as well as around 900 deaths, every year. This winter, norovirus infections are particularly bad in the U.S., according to the CDC, which is recording the highest outbreak numbers of the last decade.
There are two possible reasons for the current surge, Daniel Kuritzkes, chief of infectious diseases at Harvard Medical School told Forbes. The first is that strains of circulating viruses change each year, which reduces immune protections similarly to influenza and Covid….