How can we take measures regarding Covid-19

From Nature vol579 p265- March2020

Look at that genome tree! WH human(look at characters colored red :COVID-19)alike old corona. If you have infection with old one,PCR inspection would say positive. But it’s really false! I don’t want to imagine”false pandemic”

think about this autumn and upcoming winter season, spreading not about covid but flu, certain about of Clinic would not receive Flu inspection due to

too much to prepare same as Covid.

then if you receive PCR inspection before Flu inspection or test you would be false positive.

It’s really concerning thing.