I agree- my money is on #3 (but I’m not sure whether I would structure is as “fourth is immune” or “first three are vulnerable”- both are correct, but which is more natural word to use depends on the demographic response).
I agree- my money is on #3 (but I’m not sure whether I would structure is as “fourth is immune” or “first three are vulnerable”- both are correct, but which is more natural word to use depends on the demographic response).