TFG wrote:Yeah, those subway trains are virus breeding grounds with all that stale air and heat.
Actually, heat is aparently a good thing for flu prevention.
Flu Heads South For The Winter (NPR)
[i]... Palese and his colleagues have conducted what flu experts consider the most telling studies of flu's seasonality. Since 2007, they have studied the transmission of flu between guinea pigs, which can get infected with human flu viruses.
"What we found specifically was that cold temperatures, around 40 degrees, and low humidity —]