Ah okay, I guess it depends upon your country's testing strategy. In the UK it is more proactive and because one third of cases are asymptomatic (so you wouldn't know you had the virus but may spread it to others) regular testing is available for key workers to check asymptomatic spread. But in the UK we had very high infections and deaths until recently so we have had to do a lot of testing as part of the strategy to depress the virus.

99% oxygen sounds pretty good to me and glad you're feeling better.