HOUSTON -

Have you been tested for HIV?

In support of national HIV Testing Day on Wednesday, Walgreens is providing free HIV testing at 47 Walgreens stores in 20 cities nationwide, including Houston.

The free testing is available at select locations today through Friday from 3 p.m. to 7 p.m.

According to the CDC, of the more than 1.2 million people living in the United States with AIDS, one in five don't know they're infected. That's nearly 250,000 people.