Absolutely the right interpretation in my view. Only a small amount of virus exists in the saliva with most being on the skin surface of areas shedding the virus, which may not have been at the time. 1.5 hours on a shirt, dried out, anything would be all dead.
So basically, if any amount of the virus was present on the cough/saliva and transmitted to my shirt, there is almost no chance that the virus was passed on to me after wiping my mouth on the shirt 1.5 to 2 hours later because of the exposure to oxygen that is likely to kill the virus? Even if I had a cut or wound on my mouth that could be a route for transmission, right? (Last question)
Thank you very very much by the way for your time and responses Fleetwood. It is highly appreciated
I'm not sure how correct that is, the conditions would need to quite ideal including containment is a nurturing moist environment. Exposure to oxygen amongst other things will kill the virus.
I've read that the virus can survive for extended periods of time outside the body. Should I still be concerned?
This is zero chance. A sufficient quantity of the virus would never make to your shirt, would die in seconds and unlikely rub into nerve endings around your mouth.