I’m sure your son was sick, not doubting that, but at this time evidence says it wasn’t CoV-2. If that was possible, we should have seen a spike in NYC cases way earlier than we did. They’ve pretty much traced the introduction timeline to NYC.
In order to believe he had it, we would have to assume somehow that he came in contact with one of the first people in the United States from China, AND that both your son and that person sheltered while they were symptomatic and didn’t give it to another individual...because there wasn’t an abnormal spike in ILI in NYC in December.
I think it’s a common belief among people that they have had it, but antibody testing has proven a large majority of people haven’t been exposed. I hear all the time “yeah I was super sick, had a bad cough in January for a week, I bet that was it”....people forget so easily that during winter we have a normal, seasonal flu and common cold season. It’s more likely it was either one of those, until data says otherwise.
Another thought, just because antibody testing says positive doesn’t mean your exposure was X date. They should have told him what antibody was peaked and which one wasn’t, and would have been able to estimate his exposure period, if he got it done by a professional. Your son could have been asymptomatic with a recent CoV infection, which is very common. Also false positives exist with antibody testing as well.
Use me as a prime example. I was tested positive for CoV-2 via a nasalpharyngeal swab on April 11th. Way back on January 21 I had a fever for 2 days and a week long cough (I never get coughs, ever...in my 34 years of living I can’t recall the last time I had a cough, maybe as a kid)...I then gave my sickness to my mother, who ended up battling pneumonia Jan 22 into feb and is still recovering.
Fast forward and I’m tested positive April 11, proving that whatever I had in January wasn’t Covid, but another type of viral infection that was taxing on my lungs...either that or you can get Coronavirus twice, which as of today has been ruled out as possibility.