The only person who died (according to the attached article) was a 2 month old child - too young to get the vaccine. And the mother took the booster shot during pregnancy.

#4 | Posted by lfthndthrds

The problem is there will always be kids who are too young to get the vaccine. And they are the ones who are most at risk of dying from these diseases.

They rely on herd immunity to not be exposed to these diseases (same for measles), especially small children rely on it so they are not exposed before they are old enough to get the vaccine and the protection it provides.

You not vaccinating your kid doesn't just risk your kid. It risks other, and younger, kids much more.