Do not doubt, for one second, that the approximately 30,000 vaccine doses necessary to give all the athletes, officials and media is a small drop in the bucket, especially by June. I would hazard a guess that, assuming all essential workers, elderly, high risk, and teachers that want the vaccine have received it by then, there won't be complaints from sports fans if the various NOCs get their hands on what they need to make sure they can participate. Things are looking dire at the moment but I expect the situation will have improved tremendously in another 2 months and even further by May.