All I can tell you is before I had the “vaccine” I was on a cruise in February 2020 and caught the china virus with mild symptoms (loss of smell, scratchy throat for 2 weeks).
After getting 2 jabs, and a booster, went on 2 cruises and never got any symptoms and tested negative. Then another booster, and 2 more cruises, and again no covid symptoms. Then one more booster and 1 more cruise ending last Thursday, and still no symptoms.
Did the so called experimental vaccine help prevent covid? May be or may be not. All I know for sure is no covid after the jabs while cruising.
It's NOT a vaccine...
...and it's not rocket science for anyone with an IQ higher than a bowling ball.