We are the most amazing creatures that this world has ever produced, but we seem to also have this herd mentality; we seem to be the most stupid, also.
Entrepreneurs are like cats, because they are independent and do their own thing. Although organisations say they like cats, what they really want is sheep that they can herd.
When most members of a community are vaccinated, they protect those who are not by eliminating the viral reservoirs in the population. The effect is known as 'herd immunity.'
Herd immunity is, it turns out, not incredibly easy to understand. It took me quite a bit of reading before I fully grasped it. But understanding herd immunity is essential to understanding why we vaccinate the way we do.