This jumps out at me, glaringly so:
Originally Posted by
lindalogan
4. Covid. ... He has taken both shots, the second shot was taken at the end of August 2021. No booster.
His age makes him eligible for one booster shot. Do it. Now. They're called "boosters" for a reason. If it's been eight months since his second shot in the original series, get him boosted before this big trip. Do it. Now.