Actually not, Mariner.
We shipped my daughter over to her cousins’ house for a sleepover in hopes she would contract chicken pox, which is MUCH easier to endure as a kid than as an adult. No joy. Far as I know, she never caught it.
The natural immunity our species is developing to Chicken Pox and MMR (making them mild, childhood diseases) is so developed that some kids never get one, or more, of the diseases when they are exposed.
Their immunity is complete.
10,000 years ago these diseases took entire generations.
I would not vaccinate my kid against any of the 4.
Before vaccines for any of them, they took an average of 300-500 people per year (1950s and 60s).
The 2016-2017 Flu took 80,000.