People reinfected with cold coronaviruses. Posted May.
Why should we assume SARS-CoV-2 would be different?
Answer cannot be "novel virus", "no solid evidence that it reinfects", "I am an expert" or "magic pony for Christmas", although the latter would be most accurate.
A general finding is that antibody is present in a significant portion of adults who, in spite of possessing this antibody, can go on to have reinfection and illness.
I'm not sure I have the time to explain just how much information is out there so I am just going to post screenshots of articles dealing with airborne/aerosol spread until I get tired.
Ontario engineers and scientists now taking up the mantle and pushing for Ontario to recognize air transmission, to which the gov responds with the usual blathering response about "not through an air vent yet"