Even if you did succeed, what then? How long are you going to keep your borders closed? A restriction to a few countries might help the first week, but within a month it won’t even much matter, because there’s too much spread elsewhere. It’s not like a variant worse than Delta is going to go away any time soon, so you’re stuck in a permanent state that in most places both can’t be created and can’t be sustained if you did create it.
For those places that showed they can sustain it, would you even want to, and for how long? When would it end? What’s your plan?
The other issue with travel restrictions is they continue long, long past the time when they still make any sense. Once containment has generally been lost, the restrictions don’t do anything. At a minimum, they do nothing unless you’re in a much much better place than the region you’re cutting off, whereas there were many cases of longstanding mutual restrictions where the same variant was dominant in both places, which is pure folly.
It’s worth noting that if a new variant is about to displace the old one, then lockdowns designed to stop the spread of the old variant are much less worthwhile. Once there’s a displacement event, the previous infection level no longer matters at all. If anything, previous infections could be an advantage, if the new variant is more dangerous, and/or it means the spread can be slowed down due to natural immunity. The flip side is if somehow natural immunity was going to stop working entirely against the new variant, then every case prevented in the meantime is a pure extra case, which based on history seems unlikely but is possible.
I think this final graph is a bit confused here, unless ‘the original strain’ here means Delta. Delta had about a 120% advantage over ‘the original strain’ or 70% over Alpha. I’m going to take this to mean 500% as compared to that 120%, so 600% of original versus 220% of original, or about a 170% additional increase. Which is… better, but still quite a lot.
This is a super scary graph, assuming it is accurate.thezvi
This is gonna be a “fun” Christmas period.