One hypothesis I have seen around is that is not so much the time since the last shot, but the longer time span between shots that slows for more robust antibod

One hypothesis I have seen around is that is not so much the time since the last shot, but the longer time span between shots that slows for more robust antibody response Seems reasonable, as many of the booster doses for more established vaccines are spaced months to a year apart. There hasn’t really been enough time to study this comprehensively for the coronavirus vaccines