Before Chicken Pox vaccination was invented people would hold "Pox Parties" to infect and immunize their children at a young age when risk of severe infection w

Before Chicken Pox vaccination was invented people would hold "Pox Parties" to infect and immunize their children at a young age when risk of severe infection was low. https://en.wikipedia.org/wiki/Pox_party https://en.wikipedia.org/wiki/Pox_party