https://www.yahoo.com/news/verdict-people-whove-had-covid-004911190.html
Since scientists haven't had much time to follow up with vaccine recipients, there's no consensus yet about how long vaccine-induced immunity lasts. This uncertainty is one reason experts are hesitant to advocate anything other than the standard two-dose regimens of the Pfizer and Moderna vaccines.
There are more UNCERTAINTIES than anything with this trial on the human race.
Delaying or skipping the second dose places a lot of pressure on the first dose to provide solid, long-term immune protection, Princeton University researchers wrote Tuesday. They expressed concern that switching up the dosing regimen could lead to a "broad range" of outcomes among vaccinated people.
"A broad range of outcomes." Needless to type, that's a vague description about what COULD happen.
https://www.yahoo.com/finance/video/anytime-bad-headline-vaccines-going-160101796.html
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