[rurban]

Looking at the curves it only makes sense for Pfizer/Biontec.

Moderna holds 6 months on a 80% level. But the Moderna risk is a bit higher for younger, so the 3 months boosters are for the younger ones.

But this is all outdated with Omicron. They need adapted boosters first. Or wait for the real risk analysis. As it looks like COVID-19 goes the way of all such waves. The best surviving mutations get weaker and more infectious, until they end at the common cold. Omicron is extremely weak so far. Let's hope it stays that way