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ATLANTA, Ga. -- Health officials in Georgia offered free HIV testing Thursday in observance of National HIV testing day.

The state Department of Public Health teamed up with its national partner, Greater than AIDS, and health departments around the state to offer the free testing.

Georgians got free HIV tests at select Walgreens pharmacies, county health departments and other Greater than AIDS partners. Officials say free testing will be available at some locations throughout the weekend.

More than 1.1 million people in the U.S. are living with HIV, but 20 percent of them don't know it, health officials say. HIV testing is critical to stopping the spread of the virus.

Georgia ranks sixth in the nation for the number of AIDS cases reported through the end of 2009.