The leaders at Quantas are at least thinking of requiring
passengers to get a Covid vaccination before allowing
them to fly.
https://www.dailymail.co.uk/news/article-8980123/Qantas-require-Covid-vaccine-international-flights.html
I wonder if others will follow that pattern. Maybe a company with office
workers will require a vaccination. UPS or Amazon at their loading
facilities?
Hospitals? Maybe Medicare or health insurance companies will follow suit.
Idle speculation, of course.