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Taking antiviral drug ‘on demand’ can guard against HIV

HIV infecting an immune cell

POPPING PILLS  Taking antiviral drugs before and after sex can protect people from acquiring HIV, shown here as particles infecting a human immune cell.

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By Meghan Rosen

- More than 2 years ago

For preventing HIV infection, a daily pill may not be needed. Instead, an antiretroviral drug taken before and after sex could get the job done, researchers report in the Dec.