Norovirus Surging, 225 Outbreaks In U.S. This Season

Here’s some potentially explosive news that may be hard to stomach. Norovirus, you know that so-called “stomach virus” that can cause projectile vomiting and explosive diarrhea, has been having quite a run in both the U.K. and the U.S. A February 9 report from the U.K. Health Security Agency (UKHSA) indicated that norovirus cases in the U.K. have been 66% higher than the typical average for this time of the year. Meanwhile, a graph from the Centers for Disease Control and Prevention (CDC) shows how the average percentage of norovirus tests that have come back positive over a three-week period reached 16% at the end of January, 0.6% higher than it ever was last Winter. Moreover, from August 1, 2022 , through January 8, 2023, the CDC NoroSTAT system registered 225 reported norovirus outbreaks, up from 172 during the same time period last year. That’s meant a lot of fecal incontinence across two continents.

Melvin Sanicas, MD, a Senior Medical Director at Clover Biopharmaceuticals, tweeted out the CDC graph:

The UKHSA report quoted Lesley Larkin, BVSc, MSc, MRCVS, the Surveillance Lead, Gastrointestinal Infections and Food Safety (One Health) Division at UKHSA, as saying, “Norovirus levels are currently the highest we have seen at this time of year in over a decade. Most reported cases are in the over 65s and we’re also seeing a rise in reported outbreaks, particularly in care home settings.”

This obviously is not good news unless you happen to be the virus or really love vomiting. Norovirus, also known as the “Winter vomiting bug,” is not a fun virus to catch. It’s very rare that the words “projectile vomiting” or “explosive diarrhea” are uttered in the same sentence as the word “fun” unless there is a “not” somewhere in the middle as in “not fun” or “not that explosive.”

The virus is highly infectious as well and not in an infectious personality type of way. In fact, as I have mentioned for Forbes previously, Aron Hall, DVM, MSPH, an epidemiologist at the Centers for Disease Control and Prevention (CDC) has described norovirus as the “perfect pathogen.” That’s perfect from the virus’s perspective and not the human perspective. It doesn’t take much, as few as 18 virus particles, to cause an infection.

The virus can withstand lots of standard cleaning substances as well. So, even a clean looking surface can still have the virus on it. And in the end, or actually both ends, the virus has its ways of making you spread the virus further. A norovirus infection can make you vomit and poop more profusely than you have ever experienced over a several day period. As a result, you can leave the virus on various surfaces for your various roommates, family members, and friends to pick up as well. This keeps the virus circle of life going and going.

Even after your symptoms have resolved, you can still shed the virus for a little while longer. So don’t tell everyone, “Hey, now that I’ve stopped vomiting and having diarrhea this morning, I’ll handle making dinner tonight.” Instead, wait until at least 48 hours have passed since you last had symptoms before retuning to mixing with others.

While most healthy adults eventually make a full recovery after several days of becoming real familiar with the toilet, the infection can leave you very dehydrated unless you make an effort to drink enough fluids to replace what’s coming out of you. This can be especially problematic and even life threatening for those who are very young, much older, or immunocompromised in some way.

So how do you avoid catching norovirus? Well, if someone is vomiting or having diarrhea, you probably don’t want to lick the utensils that he or she just used or come into close contact with anything that the person may have contaminated. Don’t say, “Ewww” every time you are around the person. But it’s a good idea to keep your distance while he or she is sick. Wash your hands regularly and thoroughly too. Alcohol gels won’t kill the virus. So you could put so much hand sanitizer on your hands that you feel like you have hand sanitizer mittens and the virus could still remain on your hands. Wash your hands with soap and water instead. Keep telling yourself, “I’d lather use soap and water.”

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