-=> Aaron Thomas wrote to Alan Ianson <=-

 AT> "The polio vaccine is 90% effective at preventing polio."

That is true after two doses. Three doses are 99 to 100% effective.

 AT> "The covid vaccine doesn't prevent covid."

No vaccine prevents disease or virus from infecting someone. It helps your body fight off infection.

There is not as much data over a period of time with the covid vaccines but it's efficacy is quite high as well but the covid virus changes over time much like the flu so you may need a booster shot when new strains are dicoverd.

Immunization is a global health success story, saving millions of lives every year. Vaccines reduce risks of getting a disease by working with your body.  s natural defenses to build protection. When you get a vaccine, your immune system responds.

We are much better off with vaccines than without.

 Ttyl :-),
         Al

... You can name your salary here, I call mine fred.

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