Would not seem that boosters for the first generation vaccine would be relevant any more if the virus has mutated so much since they were introduced, and the second generation vaccine boosters (specifically for the BA.4 and BA.5 * subvariants of the Omicron variant of the virus ... as well as previous variants) is about to be available any day now
I am actually a bit perturbed about the second generation though, as this time around the FDA is only requiring results from tests on mice, not human clinical trials, in order to certify the vaccines, whether from Moderna or Pfizer .. a Cornell doctor and a Harvard doctor are split on whether this is a good idea, but the thinking is that we now know enough about how viruses work that this is sufficient
The revised FDA testing requirement does not mean that the companies themselves will forgo human clinical trials though, only that these may carry on after the vaccines are already approved
* In contrast, the new vaccine approved for the UK was only designed for the BA.1 Omicron subvariant
https://www.healthline.com/health-news/why-the-new-covid-19-booster-was-authorized-before-testing-on-people
https://www.npr.org/sections/health-shots/2022/08/18/1117778748/whats-behind-the-fdas-controversial-strategy-for-evaluating-new-covid-boosters
