"Since the late 1990s, when an outbreak of HIV infections threatened…

"Since the late 1990s, when an outbreak of HIV infections threatened to shutter the multibillion-dollar industry, the mainstream porn community has implemented procedures that require all performers to be tested for HIV and a host of other sexually transmitted infections every 14 days before they can be cleared to work. Any HIV-positive test leads to an immediate shutdown of all U.S. sets, followed by detailed contact tracing before sets can reopen. While not perfect, those in the industry say the nationwide PASS program works to protect thousands of performers, ensures safer workplaces, and curtails the spread of disease."

https://www.statnews.com/2020/05/08/porn-industry-model-for-reopening-amid-covid19/