To address your point, the flu is not even a coronavirus.
I get the flu shot every year. Still as you say it often misses the popular current strain and can be ineffective even when it doesn’t.
We are not getting an effective coronavirus vaccine any time soon.
No argument.
My point about a vaccine not being essential for most sports to restart is (a) yes, we have a flu vaccine, which less than half the population ever gets, and (b) we have tens of thousands deaths from seasonal flu every year, but somehow in spite of all those deaths and that the flu is passed from person to person, and ANY player could have it and any player could get, and any spectator could have it and any spectator could get it, life goes on, our sports are played.
And who mostly dies from the flu? Old folks with comorbidity issues are number one, and little kids are number two. And who mostly dies from the Wuhan Virus? Older folks with comorbidity issues.
Stopping sports just because there is no Wuhan Virus vaccine just does not make any sense.