the study period ran 70 days. That doesn’t mean the booster only lasts 70 days. See my post #27
But to answer your question, if I were uber high risk and over 65, and a pandemic in my area was burning thru old people like fire through a lumber mill, I’d be looking at anything that might perserve my life given my own strong instinct to survive. I might think differently were I aged 25.
I never said it did. But that is the only published and approved result of the study. Therefore, anything else is supposition. If you want to claim any level of effectiveness on the 71st day, you need data to support it. Thanks.