How should politicians be thinking about this? US based optimization or global optimization? There's pressure to optimize for US protection short term, but without the global optimization it becomes more likely for new variants to pop up.
Krause, P. R., Fleming, T. R., Peto, R., Longini, I. M., Figueroa, J. P., Sterne, J. A., ... & Henao-Restrepo, A. M. (2021). Considerations in boosting COVID-19 vaccine immune responses. The Lancet, 398(10308), 1377-1380.
any response that can't be clicked on loses it's value, i think. even when the link is presented, if it's not hyperlinked... or if an image thumbnail doesn't show up... of course these are also general comment chat features, not idiosyncratic here, but could be an opportunity to do our own unique thing