After an “active COVID-19 summer,” health officials in Utah are recommending people renew their booster vaccinations — amid concerns of a winter surge of the virus that may affect the state.

Data from the Centers for Disease Control and Prevention show COVID-19 virus levels reached “very high” in Utah wastewaters since mid-July, with 10 sites reporting viral activity in the last 45 days. This time last year, Utah saw “moderate” levels.

“Many more people are having a milder illness when they get infected, but not everyone,” Dr. Andy Pavia, chief of the Division of Pediatric Infectious Diseases at the University of Utah Health and Primary Children’s Hospital, said Wednesday in a remote briefing to media outlets. “We have seen severe disease and even several deaths.”

Upticks in cases across the country and Utah first appeared in the spring from the XP.1, XP.2, KP.3.1.1, KP.1 and KP.2 variants of the coronavirus. But even as Utah sees a “downswing” in cases, health officials anticipate another increase sometime this winter.

A new variant, called XEC, will likely fuel the late-year surge. So far this year, 95 XEC cases have appeared in 12 states, including in New York and California, according to Outbreak.info, a data project managed by Scripps Research.

Across the Salt Lake Valley, Pfizer, Moderna and Novavax boosters are available at most pharmacies and clinics, said Kavish Choudhary, chief of the University of Utah Health Pharmacy, in the briefing.

The Utah Department of Health and Human Services will continue to supply free vaccines for those without insurance, Choudhary added. The U will only carry the Pfizer vaccine.

According to Choudhary, all available coronavirus vaccines are 90% to 95% effective

“If you’re interacting with most folks, people on the outside on a regular basis, … that’s the push for getting a shot,” Choudhary said.

While officials encourage continued coronavirus precautions, they also suggest keeping up with other respiratory illnesses heading into flu season. For the 2022-23 season, the CDC estimates 31 million people experienced flu symptoms, with 21,000 deaths as a result.

“Flu is still out there,” Pavia said. “It’s time to think about not just COVID vaccines, but flu vaccines.”

For those who cannot get vaccinated or who are at high risk of severe disease, Pavia recommends masking as an effective way to prevent infection.

“Wearing a mask indoors and in crowded places is wise,” Pavia said. “It’s not popular. We’ve all worn masks too much, and we’re tired of it, but it still offers very good protection.”