[blub]

Facts on the ground are continuously changing and have been for the duration of the pandemic: e.g. risk of myocarditis for young males. Medical bodies are reacting to these changes, in that case by recommending against Moderna for people younger than 30.

Another example is the recommendation for AstraZeneca which was first not offered to older people because of unclear efficiency data, and then not offered to younger people because of the risk of blood clots.

Yet another example is the recommendation for boosters against Omicron. Israel's backing off from recommending a fourth to the general population because among other things the faster loss of protection.