posted by Laley23
Of course you are a coin flip. What were you expecting? I am sure there is a vaccine out there that actually keeps you from getting a disease. But that is not how 99% of them work. A vaccine doesn't magically keep someones cough cells from entering your body. You aren't walking around with an invisible forcefield that only activates for certain diseases lol.
You get the vaccine because when you are infected, it fights it off quicker, more effectively, and reduces your risk of symptoms/bad symptoms. All that inherently reduces — significantly — the spread of the virus/disease from you to someone else.
Wasting your time explaining this to him.