I am wondering what will happen in summer, because it seems a few places now are asking for proof of vaccination in last 6 months, but by July/August a lot of people in a lot of countries won't have been vaccinated within that period. But presumably unless a country is vaccinating everyone every 6 months (which probably no one except maybe Israel is doing) it'd be a bit counterproductive and pointless to expect it of everyone else coming to that country.
We're going to Slovakia at end of May and right now they have a 9-month requirement, so we'll still be OK for that if still the case. I will get my mum to check the rules in Slovak before we go so we can be sure.
Dunno what we're doing in summer yet - we were thinking of resurrecting out 2020 USA plan, but I'm trying to change jobs so we may find I don't have that much holiday allowance unless I get one starting before June. Or after August.