An uptick in COVID hospitalizations and concerns over another surge has many people once again seeking out free virus testing kits.

Expiration of the Public Health Emergency on May 11 put an end to much of the free testing and many of the previously free kits mailed to the public have expired. You can check to see if the expiration date on your at-home test has been extended at a Food and Drug Administration site here.

While at-home kits may now come with a cost, free testing is available at some 15,000 retail locations across the country, CBS News reported. This includes locations such as CVS, Walgreens and other pharmacies and clinics.

The Centers for Disease Control and Prevention has a website that allows you to search for free COVID testing sites. Users can search by distance and ZIP code or street address. You can search that site here.

You can also search for Alabama Department of Public Health testing sites here.

When should you get tested for COVID-19?

According to the CDC, people with symptoms should get tested immediately, preferrable with a PCR test as opposed to an antigen, or rapid, test. You can see the difference in those here. If you do use an antigen test, the CDC said a positive result is reliable but a negative one might not be. If your antigen test is negative, it’s recommended you take another antigen test after 48 hours or take a PCR test as soon as you can.

If you do not have symptoms but know you’ve been exposed to COVID-19, you should wait at least five full days after exposure before taking a test. It’s also recommended people who don’t have symptoms or recent COVID exposure to test if they are going to be around someone at higher risk.