When Robert De Andreis' columns were published on Wednesdays, they became must-reads.

Gay and bisexual men taking PrEP before and after sex — known as the 2-1-1 regimen — reported good adherence and none were diagnosed with HIV, according to a new study from Kaiser Permanente San Francisco.

People have questions about sex and intimacy during the novel coronavirus pandemic.

Long-acting injections given once every two months can prevent HIV at least as well as daily pills for gay and bisexual men and transgender women, according to interim study results released May 18 by the National Institutes of Health.

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People living with HIV in San Francisco are not contracting the new coronavirus or developing severe COVID-19 more than HIV-negative people, speakers said at an April 23 virtual town hall.

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In what one researcher said was "jarring," 54% of HIV-negative young adults didn't report using condoms or PrEP — two critical tools in preventing the spread of the virus that causes AIDS — according to the results of a survey released Monday.

Leading HIV researchers have come to believe that at least one person has found a way to naturally rid their body of the virus.

The federal Food and Drug Administration October 3 approved a new daily PrEP pill that could offer a safer option for some individuals at risk for HIV, but the indication does not cover everyone who could potentially benefit from the prevention medication

New study shows that HIV can remain in the fluid surrounding the brain even after a decade on antiretroviral treatment.

Organizers of the International AIDS Conference set to be co-hosted by San Francisco and Oakland next summer are seeking $2 million from the state.

The largest treatment-as-prevention study for gay and bisexual men confirms that people on antiretroviral therapy with undetectable viral load do not transmit HIV.

Gilead Sciences announced last week it will donate millions of free bottles of Truvada for PrEP to the Centers for Disease Control and Prevention, but many AIDS activists say it is not enough.