Every summer for the past several years, including this summer, COVID cases have increased throughout the United States as people spend time in air-conditioned spaces and as summer travel peaks.

Roughly half of the states in the country currently have increasing numbers of COVID-19 infections, said Dr. Matthew Lokant, an infectious disease specialist at the West Virginia University School of Medicine.

“Most of those COVID-19 [infections] are associated with two newer variants being Nimbus and Stratus — these are the strains that are contributing to that seasonal surge that we’re currently seeing in the U.S.,” Lokant said.

Here are the main symptoms of a COVID infection this summer and what you can do to stay healthy:

COVID symptoms this summer look a lot like symptoms from earlier strains, such as fatigue, runny nose and a headache.