As I said, it can't get a foothold. If vaccinations are enough to keep the r0 below 1, which seems to be the case, it doesn't really matter how many infected pe

As I said, it can't get a foothold. If vaccinations are enough to keep the r0 below 1, which seems to be the case, it doesn't really matter how many infected people enter because it will fizzle out again. Vaccines are also likely to be mandatory for anyone traveling.