Chicken pox is highly contagious but, yes, not among the most deadly. It kills about 1 in 60k cases.
Mumps is far deadlier than chicken pox. It kills about 5 per 1000 infected.
Vaccines have helped obliterate these and other diseases. Good sanitation is crucial to almost all infectious disease prevention. But vaccines play a critically important role too.
Sorry but I don’t think you’re correct. Measles killed More than 200k in 2019 alone due to outbreaks in regions where vaccination was low. Vaccination for measles has been estimated to have saved 25m+ lives since 2000. https://www.healio.com/news/infectious-disease/20201112/measles-killed-207k-people-in-2019-as-cases-hit-23year-high
Chicken pox is highly contagious but, yes, not among the most deadly. It kills about 1 in 60k cases.
Mumps is far deadlier than chicken pox. It kills about 5 per 1000 infected.
Vaccines have helped obliterate these and other diseases. Good sanitation is crucial to almost all infectious disease prevention. But vaccines play a critically important role too.