Herd immunity is the biggest benefit of vaccines since vaccines aren't 100% effective, no vaccine is. The Smallpox vaccine is 95+ effective and loses effectiven

Herd immunity is the biggest benefit of vaccines since vaccines aren't 100% effective, no vaccine is. The Smallpox vaccine is 95+ effective and loses effectiveness over time. Yet, we don't see Smallpox outbreaks. It's all related to herd immunity. The COVID vaccines have a high immunity rate but they will only stop outbreaks, if the majority of people will use them. If we don't act together, it's going to take a long time for that to happen.