I am particularly vexed by the continued usage of #ImmunityDebt. It is not an established concept, and has never been used prior to the pandemic. And it mixes and matches a) population immunity, which is trivially true, b) individual severity effects, which are not, c) has echoes of the still controversial 'hygiene hypothesis', and d) uses a loaded colloquialism - 'debt' - to whom, and why? Would much prefer we stuck to precise terminology.