Tesla CEO Elon Musk questioned the accuracy of rapid antigen tests for Covid-19 on Thursday after his Covid test threw up conflicting results. Musk tweeted that something bogus was going on and then explained that he was tested for the virus four times on Thursday but two tests came positive and the remaining two came back negative. He further added that the rapid antigen tests were conducted on the same machine by the same nurse. The Tesla CEO is also awaiting results from polymerase chain reaction (PCR) tests from different labs.