A man in his early twenties walks into a public toilet in Los Angeles. He heads for a cubicle, kicking it open. The camera follows as he kneels, lowers his head and begins to lick the toilet bowl. He looks up at the camera, smiles, and says “coronavirus challenge” before licking the bowl again.
On the social media platform TikTok, this young man calls himself Larz. He posted the 13-second video on 20 March, the day that the global death toll from Covid-19 passed 10,000. It was accompanied by the message, “RT to spread awareness of coronavirus”, with a smiley face. Two days later, Larz posted another video of himself, this time from a hospital bed. “I tested positive for coronavirus”, the post read, with a crying face added.