Ceiling-mounted Covid 'alarm' warns if someone in a room is infected

British scientists say they have developed a ceiling-mounted Covid "alarm" slightly smaller than a fire alarm that can detect anyone infected in as little as 15 minutes. — dpa

What if there was a non-invasive way to tell if someone in the room with you is infected with the coronavirus?

British scientists say they have developed a ceiling-mounted Covid "alarm" that can detect anyone infected in as little as 15 minutes.