Your question reminds me of a time years ago when TV Repairmen made house calls. They'd pick up your TV, take it to their shop & bring it back repaired.By chance are you a Doctor or a Retired Doctor or a Medical Expert in the field of Infectious Diseases?
One electrician picked up our TV & when he brought it back, I turned it on & the picture was still bad. I showed him the picture & he asked me, "Are you an electrician?"
I said, "No, but I don't have to be; I have two eyes that work fine & I can see that you didn't repair it."
Thinkers use logic - which doesn't require a degree.