In turn, anti-vaxxers are killing people whose immune system is compromised by a variety of circumstances (cancer treatment, vaccine allergies, diseases etc). I

In turn, anti-vaxxers are killing people whose immune system is compromised by a variety of circumstances (cancer treatment, vaccine allergies, diseases etc). It also doesn't stop the fact that viruses are not some static class. They can mutate, which makes this line of thinking especially dangerous if they start mutating to get around the original vaccine. This is before we even talk about vaccine efficiency. In the worst case scenario, evolution means we start wiping out vast amounts of the human population because of a growth in previously preventable diseases.