As it isn't airborne beyond in droplet form most flu/cold spread is from lack of hand hygiene and touching surfaces, people touch their eyes/face/mouth without even thinking about it many times every hour, people certainly don't wash their hands as often as they touch their face and a surface afterwards....
A double digit percentage of people don't wash their hands when coming from work or from a trip to the store, and that double digit percentage is realistically not very likely to be on the low side................
As it isn't airborne beyond in droplet form most flu/cold spread is from lack of hand hygiene and touching surfaces, people touch their eyes/face/mouth without even thinking about it many times every hour, people certainly don't wash their hands as often as they touch their face and a surface afterwards....
A double digit percentage of people don't wash their hands when coming from work or from a trip to the store, and that double digit percentage is realistically not very likely to be on the low side................