We do not need a vaccine to travel again. Widespread availability of a vaccine is probably two years away even if it’s developed in a year, since it has to be manufactured and distributed at massive scale. However a gimmick like an immunity passport, given our limited knowledge of the virus right now, isn’t likely to get us back in the sky.
So don’t get infected just because you think recovering from the virus will help you to travel, because it probably won’t.