It says yesterday someone was tested positive. Where are you getting that today was the first day of testing? (edit: ah, I see: it says yesterday was the first day of testing at that lab) And please read your first image more closely - pay special attention to the very first thing said. They're only reporting the tests that have been reported to them about people who have been "presumed positive", or in other words, people who have a reasonable suspicion of being infected. Less than 1/20 of those presumed positive were actually positive, which suggests some level of aggressiveness to the standard of who is presumed positive.