If there is a great benefit to all people by getting injected without any disclosure of ingredients from companies making billions of dollars, how is there people who have never had an injection in their whole life still walking around and performing work duties without it?

If some people were killed and disabled by the injections, and others are doing fine with the injections, along with those who never got it were killed and others who have never had it are living successful lives, where is the benefit to getting it if people are living happily without it?