It takes time to boost our immune system with a vaccine. Around two weeks. The protection is not immediate.
Those who have been vaccinated can still contract COVID however the illness is not as severe and there is a 99.8% chance that you won't die from it. Compare that to those who are unvaccinated and contract the virus.
Yes, we are still waiting FDA appproval. More than 2.75 billion doses of COVID vaccines have been administered globally. If we waited for FDA approval think about where we would be right now. The science of the efficacy of the vaccine is there with or without FDA approval.
Flu vaccines are only about 50% effective. COVID vaccines are over 90% effective. Nothing is 100% except dying.
You bring up good points, Martha. I have been wondering about the survival rates overall for Covid now that the Delta variant has been making rounds. Prior to the Delta variant I read that the CDC numbers listed a survival rate for Covid of 99.74%. I'd like to know how that's changed and how significantly that percentage has gone down (ie how much higher mortality has increased) at present. I think the overall survivability percentage for Covid of 99.74% was an older figure, pre-Delta.