You dont fall ill that fast people.
I did. A little over 24 hours symptoms showed after Asians were coughing all over me. Hadn’t been anywhere else previous to that or after that.
Relentless sneezing, worst runny nose I have ever had and a headache.
Likely caught a cold
Knocked it out overnight.
I think I have read that the infection period is as short as two days, now out to maybe 28 or more days, can be re-caught, etc. This is very dangerous. And for an 83 year old, could be deadly.
He only has one lung.