Honestly I don’t think masks have been the key to success in those places that did get down to zero. Instead, the key seems to have been: * Border controls. In

Honestly I don’t think masks have been the key to success in those places that did get down to zero. Instead, the key seems to have been: * Border controls. Including internal borders in large countries. * Tests * Lockdowns implemented when needed and kept till cases zero, then lifted. These can be really short if you do it with small caseloads * Acting fast with whatever action they take. No wait and see. Masks are a great complematary tool, and they help limit the damage of reintroductions when they do happen. But if everyone wore masks but travel were open and testing was insufficient, you’d have plenty of covid.