The boxed tests, the take-home ones. In particular, the ones available in the United States (I think other countries were using other rapid tests than the US).

The boxed tests, the take-home ones. In particular, the ones available in the United States (I think other countries were using other rapid tests than the US). I cannot find the link, but the rate was something ridiculous, way north of 50%. I take it with a grain of salt, I can't easily tell if it's just more propaganda from the covid-ain't-real people.