A highly contagious virus is making its presence known as the holiday season approaches, and it’s not the flu or COVID-19 — it’s norovirus. Known as the “winter vomiting disease,” norovirus has been spreading across the U.S., particularly in states like Louisiana, Michigan, and Indiana.
The Current Situation
Data shows that norovirus levels have surged 69% nationwide since mid-October, according to Amanda Bidwell, scientific program manager for the WastewaterSCAN program at Stanford University. She explains that we are now in the high category for norovirus across the nation. Although it’s lower than last year’s spike, where 235 outbreaks were reported from August to November, we’re still seeing an increase.
What’s Behind This Surge?
For over three decades, the GII.4 strain dominated norovirus outbreaks. Last year, however, the GII.17 variant emerged, leading to many of the recent cases. Experts speculate that this variant may have mutated, contributing to its increased transmissibility. Dr. Robert Atmar, from Baylor College of Medicine, mentions that a combination of factors may be fueling GII.17’s rise.
Less immunity in the population could also play a part; many people may not have been exposed to this variant before, making them more vulnerable.
Symptoms and Spread
Norovirus is incredibly contagious, leading to about 20 million infections a year in the U.S. The main symptoms are diarrhea, vomiting, stomach pains, and sometimes fever. Symptoms show up between 12 to 48 hours after exposure and can last a few days. Notably, even after recovery, individuals may still spread the virus for over two weeks.
How to Protect Yourself
Norovirus is tough to kill and can survive high temperatures. Washing hands thoroughly with soap is vital, as many sanitizers are less effective against this virus. The CDC recommends using diluted bleach to clean surfaces and washing contaminated clothes in hot water.
While there’s no specific treatment, staying hydrated is key. Currently, a vaccine is not available, but trials, like one from Moderna, are in progress.
Looking Forward
Experts are monitoring the situation closely. Bidwell notes that the seasonal pattern for norovirus shows a peak during these colder months, making it crucial for communities to be aware and take preventive measures.
For more detailed statistics and ongoing updates about norovirus, you can reference projects like WastewaterSCAN and resources from the CDC.
Understanding the risks and symptoms of norovirus is essential this season as we gather with friends and family, so stay informed and take preventive steps to protect yourself and others.
