Cold weather or just sitting in front of an AC vent gives me the sniffles. The cure to the common cold is wearing a jacket. I checked the weather in Italy and China when the "outbreak" started. Weather was terrible. Is was cold and wet. 50 degrees F or less at night. If it's 80 degrees during the day, it means people don't think they need a jacket, then all of the sudden its eveneing and its cold, drizzly with no sun and they're wearing a T-shirt. At least people in Minnesota in December stay inside with their furnace on and don't dare leave the house without layers of clothing and jacket.
Older people tend to be frail and get cold easier. They are less mobile in nursing homes, and not surprised if the AC is kept cold. Catching colds still happens in hot states during summer because buildings run their AC all the time. It's not simply kept at 72 degrees. What comes out of the vents is always in the 50s or below. Every room has a vent and it may be pointed at their face while they weigh 90 pounds and bed ridden in a nursing home.
Large venues are even works about AC management as it's very difficult. They crank it as low as possible because once the venue fills up it starts to get warm from all the people crowded in there. So it may be hot outside dressed in shorts and tee and you're sitting for an hour or more in front of a 30-50 degree vent blasting. Many scenereos where people are not prepared for extended cold drafts.
Your body shivers for a reason. It sniffles for a reason when your air passages get dried and cracked from cold draft. You can probably get yourself sick like clockwork, just spending an hour in poor temperature conditions.
The reaction to the "pandemic" has been the worst case secenereo for above. People are not going out in the heat etc. Mask cuts off oxygen etc.
The difference between covid and the cold is how long they they run the test sample as far as I'm concerned. The difference between getting sick and not getting sick is how good you are at staying warm under any circumstantial conditions. If you shiver, you fever.