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How Older Adults Can Survive the ‘Quad-emic’

Lower your risk of getting sick from the winter surge in COVID, flu, norovirus and RSV


someone blowing their nose surrounded by colorful virus illustrations
Photo Collage: AARP; (Source: Getty Images (3))

A trio of respiratory illnesses — flu, COVID-19 and RSV — is sweeping the U.S. and leaving a trail of coughing and aching victims in its wake. But this winter, there’s a fourth bug that’s also bringing misery to the masses: Outbreaks of norovirus, a gastrointestinal affliction, are surging too, data from the Centers for Disease Control and Prevention (CDC) shows. The convergence of all four has spawned the nickname the “quad-emic.”

An uptick in any of these viral illnesses is not unexpected this time of year, health experts say. Cases of flu, COVID and RSV (short for respiratory syncytial virus) tend to start climbing in the fall and peak in the winter months. Currently, emergency room visits for flu and RSV are high and continue to increase, the latest CDC data shows.  

Norovirus cases also tend to creep up in the cold-weather months, even though you can catch the nasty stomach bug any time of year, says William Schaffner, M.D., professor of preventive medicine and infectious diseases at Vanderbilt University School of Medicine. However this year, “we appear to be having, across the country, a more substantial winter increase of norovirus,” Schaffner says. According to the CDC, reported norovirus outbreaks for the 2024-2025 season are the highest they have been in 12 years.

Edward Liu, M.D., chief of infectious diseases at Hackensack Meridian Jersey Shore University Medical Center in New Jersey, says we don’t have a clear understanding as to why norovirus cases are especially high this year. It could be that more people are clustering together this winter, he says. (Norovirus is highly contagious and can spread quickly and easily from person to person.) 

A new strain of the virus could also be to blame, since “newer strains generally circulate more widely until things tamp down,” Schaffner adds.

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Quad-emic is a threat to older adults

Age-related changes that impact the immune system — plus underlying chronic health issues that become more common with age — put older adults at higher risk for serious complications from respiratory illnesses such as COVID, flu and RSV, the CDC says. Warning signs of severe illness with these infections can include trouble breathing, pain or pressure in the chest, and dizziness or confusion, among others.

Similarly, older adults are among those at higher risk for complications from a norovirus infection. The virus causes around 900 deaths in the U.S. each year, and most are among adults aged 65 and older, the CDC says.

The concern with norovirus, which brings on vomiting and diarrhea, is dehydration, Schaffner says. “Deaths associated with norovirus usually are a consequence of dehydration and also loss of control of chronic underlying illnesses,” he says.

Older adults are more vulnerable to dehydration, research shows, since the amount of water in our bodies decreases with age. Decreased kidney function can also affect fluid levels in older bodies, the Cleveland Clinic says. Signs of dehydration can include decreased urination, dry mouth and throat, fatigue, and feeling dizzy when standing up, according to the CDC.

What’s more, weakness caused by days of nausea and vomiting with a norovirus infection can put older adults at higher risk for falls, Liu says. And falls are the leading cause of injury among adults 65-plus.

Staying healthy during a quad-emic

Just because there’s a lot of illness swirling about this winter, doesn’t mean you’re destined to spend the season sick. There are vaccines that can protect against severe illness for COVID, flu and RSV, and health officials recommend that older adults get them. (No, it's not too late to get the shots if you skipped them this fall, doctors say.)

Masks can also help thwart an infection from influenza, COVID and RSV, Schaffner says, since they are spread mainly by way of respiratory droplets that are made when people exhale, cough, talk or sneeze.

When it comes to norovirus, hand washing is key, Liu says, since the virus spreads through contaminated food, water or surfaces, where it can survive for days, even weeks. And it’s best to skip the hand sanitizer and stick to soap and water, since sanitizers are not very effective against norovirus, Schaffner says.

Folks who are more susceptible to severe illness from any of these bugs may also want to consider social distancing during the current outbreak. “Stream the movie rather than going to the movie,” Schaffner says. And watch yourself around the grandkids if they have been sick, since “it's very easy to pass [these illnesses] from the grandkids to grandparents,” Liu says.  

The good news: Just like spikes in virus activity are expected in the winter, lulls are expected in the spring. “Generally, we see less of it once it starts to warm up,” Liu says.  

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