Merrifield doesn’t likely have to worry about that because no contending organization with a brain trades for him now. I’m sure the Royals front office loves the fact some of their most valuable trade candidates have torpedoed their value by not getting a simple shot.
BA.5 is more infectious than measles, and has been known to reinfect people within weeks of recovering from a prior infection. It seems relatively mild, though.
My guess is that some strain of COVID will eventually obliterate the infection rate of measles, as we’re finding out that pretty much the entire population of the earth is vunerable, even those who have had it recently. Hell, we may find a day that the people who currently are infected with COVID can still be infected again with a different strain of COVID.
I traveled to Seattle a couple weekends ago for a family thing. A couple of days after I got home six people that went on the trip, all of whom I’d been in close contact with, had COVID. I still haven’t gotten it.
I’m sure my number will get called eventually, but after that trip and the rest of my household getting it last December/January, I’m actually starting to think that I’m immune to it.