Got the sniffles? What summer colds and COVID’s “Stratus” variant mean

United States: When most people think of summer, they picture sunshine, barbecues, and vacations — not coughs, fevers, and sore throats. Cold and flu season is usually linked with winter, but that doesn’t mean you can’t get sick when the weather is warm.

In fact, new federal data show that COVID-19 cases are rising in many US states, with more people of all ages presenting at emergency rooms.

What the Numbers Show

According to the CDC:

• Flu cases are dropping.
• RSV cases have stayed steady.
• COVID-19 cases are climbing again, with “moderate” activity levels seen in wastewater samples nationwide.

The XFG variant of COVID-19, known as “Stratus,” is now the most common strain in the U.S. This version can cause a painful, razor-like sore throat. The World Health Organization is tracking it, although experts say vaccines still offer protection against it, according to AP News.

Doctors expect COVID-19 to eventually become a seasonal illness, similar to other coronaviruses. Still, in recent years, the US has seen surprise late-summer waves.

Other Viruses That Spread in Summer

COVID-19 isn’t the only thing to watch out for. Other infections active during hot months include:

• Hand, foot, and mouth disease – starts like a cold but adds sores and rashes.
• Norovirus – often called the “stomach flu,” leading to vomiting and diarrhea.

Many viruses prefer cooler months, but that doesn’t mean summer is free from sickness.

Why People Still Get Sick in Hot Weather

The season itself isn’t the real cause of illness — our behavior plays a big role.

• In mild weather, people spend more time outdoors where viruses spread less easily.
• When it’s extremely hot, everyone crowds indoors with air conditioning, making it easier for germs to pass around.

As Dr. Frank LoVecchio explained:

“On the East Coast, everyone gets sick in the winter. In Arizona, a lot of people get sick in the summer because it’s too hot to be outside.”

Vaccines and Timing

Doctors say the best time to get a booster shot depends on your personal plans and health:

• If you have a big trip or event, consider getting boosted a few weeks in advance.
• For most healthy individuals, waiting until fall may offer the strongest protection as cases rise.
• Older adults, young children, and individuals with weakened immune systems may require additional doses — always consult a doctor, as advised by the Associated Press.

Recently, Health Secretary Robert F. Kennedy Jr. stated that COVID-19 shots are no longer necessary for healthy children, but major medical groups disagree. The American Academy of Pediatrics still recommends vaccines for children over 6 months.

How to Stay Healthy This Summer

The same steps that protect you in winter still apply in the summer:

• Wash your hands often.
• Spend more time outside when possible.
• Wear a mask if you’re in crowded indoor spaces.
• If you’re sick, stay home to protect others.