So USA will be still be okay and back to normal by Fall/Winter this year as vaccines as boosters? Most people are getting vaccines like flu, even they'll be more safe than last time. Now WDW will have much better as by Fall/Winter.No way to know until time passes. They are looking at how much protection remains in a person since their doses were taken, apparently enough remains after 6 months that they believe it will still be present for at least a number of months beyond that. But again, until time passes, they won't know how long. Could be 1 year, could be 10 months, could be longer. Unknown at this point which is why some are saying booster shots, taken annually like an annual flu shot, may be necessary.