New York (CNN Business) SpaceX CEO Elon Musk said on social media last night that he took four Covid-19 tests in one day, two of which were positive and two of which were negative. It's not clear if Musk had been planning to attend the launch in Florida, though he is frequently seen at SpaceX's launch control at the Kennedy Space Center during important SpaceX missions. The original launch date was Saturday evening, but officials delayed that earlier today due to unfavorable weather conditions, NASA and SpaceX officials said. And though both types of tests rely on a nasal swab, PCR tests require complicated specialized labs and trained technicians to conduct . That's why in the early days of the pandemic, PCR tests were heavily backlogged, sometimes taking more than a week to return results.

Source: CNN November 13, 2020 20:19 UTC