With COVID-19 cases going up, you might want to think about masking up.

Across the country, more than 100,000 new cases have been reported every day over the past two weeks, but experts say that number could actually be higher.

New data from the Centers for Disease Control and Prevention shows about one-third of the U.S. population is now living in a county with a “high COVID-19 community level,” which means the agency recommends universal indoor masking.

John Hopkins University reports new COVID-19 cases rising slowly, which 108,000 new cases reported every day over the past two weeks. That is up 6% from the two weeks prior.

A recent pre-print study based on health records from the Veteran’s Administration shows that catching COVID-19 over and over again appears to increase the chances a person will experience new and sometimes lasting health problems after their infection.

People who had two or more documented infections had more than twice the risk of dying and three times the risk of being hospitalized within six months of their last infection.