>any person who tests positive will be counted as a positive test only once, no matter how many times they test positive. But a person who tests negative will be counted over and over again each time they test negative for the coronavirus.

Which is a reasonable assertion about "the data".

This is where the point about her not being a data scientist comes into play, and needs to be cleared before going into anything else, such as her personal life/drama. She, like many others, including those in this comments section, are running afoul when it comes to familiarity with the subject matter of the data.

You get counted as a positive case "only once", because (early on in theory) you only get the disease once. Whether that's true or not is beyond her paygrade, to say the least.