> What I don't understand is this obsession about the vaccination status of strangers. Herd immunity. It's an important part of the efficacy of the vaccination

> What I don't understand is this obsession about the vaccination status of strangers. Herd immunity. It's an important part of the efficacy of the vaccination of highly contagious pathogens. It's why smallpox is now just a page on Wikipedia, rather than an existential risk to your life.