> * As the pandemic eases are we in a situation needing to continue booster shots say on some reoccurring basis as a preventative measure?* Most likely. SARS-C

> * As the pandemic eases are we in a situation needing to continue booster shots say on some reoccurring basis as a preventative measure?* Most likely. SARS-CoV-2 is now endemic in the human population & unlikely to die out. The general impression in the scientific community is that the current set of vaccines should be protective for at least a year or two, at which point variants will have emerged that evade the vaccines developed on the Wuhan strain. Booster shots developed on these new variants would be required for the foreseeable future. > Or something a bit more reactive where it is possible to get a shot after infected or having symptoms and whether mRNA works in this way as well on a reactive basis. In principle this is possible - some vaccines are capable of arresting an active infection, though that is highly specific to certain pathogens. This is not something current COVID vaccines can do.