Pretense is perfectly acceptable in my neck of the woods, Sandman, but reading your post I find I've been misspelling "sprting" my whole life. Thanks.
If people want to shun the vaccination that's their business, if they want to go out and spread their germs at large public gatherings, e.g. tennis tournaments, that's everybody's business.
Btw, if success on the court is the measure, then McEnroe, Connors, Nastase, Serena and the like are all stellar examples of good sportsmanship.