During Thursday’s White House coronavirus press briefing (via YouTube), President Donald Trump discussed injecting disinfectants into the body in order to tackle COVID-19. Shortly after, some doctors decided to take to social media to warn people not to drink or inject chemicals like bleach or isopropyl alcohol in an attempt to fight the coronavirus.

William Bryan, a member of the coronavirus task force and DHS leader, joined the press briefing to discuss the impact of sunlight on the virus, concluding that it best survives indoors in dry conditions. Bleach and isopropyl alcohol kill the virus quickly, he reported.

Trump then stepped up to the podium and assured people that they wouldn’t “believe” what sunlight can do to the virus. He went on to ask about the possibility of doctors being able to inject patients with UV light somehow, also questioning whether scientists could find a way to treat people with disinfectants, “by injections inside or almost a cleaning.” He concluded that it would be “interesting” to look into the possibility and claimed that some researchers are already looking into the possibility.

When Bryan was asked by a reporter to clarify his idea of injecting such chemicals into the body, he said that his lab wasn’t participating in that sort of research.

“It wouldn’t be through injections. Maybe it works, maybe it doesn’t work,” Trump interjected, clarifying. The president added that disinfectants have an impact on “stationary objects.”

Dr. Dara Kass responded on Twitter with a warning to people not to try injecting disinfectants.

Please don't drink bleach or isopropyl alcohol to remove #COVID19 from your saliva. Please. — Dara Kass, MD (@darakass) April 23, 2020

Dr. Jack Brown warned that the idea of injecting bleach or isopropyl alcohol is “dangerous” and worried that people would follow his musings and end up killing themselves.

The Centers for Disease Control and Prevention (CDC) says that 70 percent alcohol is an effective way to kill the virus on hard surfaces and may be used to wipe screens, electronics, doorknobs, and similar surfaces.

During the briefing, Trump also warned that social isolation measures may last to the fall, and he weighed in on the use of hydroxychloroquine, saying that the science was still out on whether or not the anti-malarial drug may impact the novel coronavirus. Studies are currently being conducted on the matter.

The use of the drug has been controversial, with recent rumors that the president fired one of his experts for disagreeing with his on whether or not to use it in the treatment of COVID-19.