I am not a medical expert, not even close, but the following report does make sense to me.  So I would like to share it with you, and please make judgement all by yourselves.

https://www.ixigua.com/6980898050046853669?logTag=1b7ea43b4325b1897ad3 

FYI. Ct值: cycle threshold value (循環數閥值)

       PCR: Polymerase Chain Reaction(核酸檢測)