20:00More or LessVaccine waning, hot dogs and AfghanistanBBC Radio 4 Duration: 28 minutes Sun 12th Sep 2021, 20:00 on BBC Radio 4 LWAvailable for over a yearListen nowHow worried should we be about antibodies? Plus food that shortens life. Show more GenresFactualArts, Culture & the MediaBrandMore or Less Source: BBC Online