@Ruth ******
Keep dreaming. About half the world doesn't want this shot, and secondly, there is nothing to suggest a vaccine will become a travel requirement in 2021. In fact, there are MANY indications that masks, social distancing and even quarantines will remain DESPITE a vaccine.
Yes, the media HAS spoken of the possibility of a travel vaccine requirement in the future, but to me that's old news. I've known about this since 2017. I knew that during the 2020s, governments would try to coerce adults into getting vaccinated and this may include a travel vaccine requirement. However, getting it implemented is easier said than done, and it would be unprecedented for an experimental vaccine to be forced on the people against their will to travel, so soon after being approved.
I don't know what the future holds, but IF it happens, it won't be that soon. Maybe 2022 or 23, but not before.