(the oral history is obviously a bit sketchy, but she used to tell me her father also caught TB - cholera maybe ? - when he was removing bodies from the flooded Balham tube station in 1940 - https://www.ianvisits.co.uk/articles/75th-anniversary-of-the...)
Well, I got quite the scolding about missing my jabs and a stern lecture about how many awful diseases have been cured because of vaccination. I could never forget how emotional she was about it.
To people born in the early 20th century, seeing the effects first hand of the vaccination programmes of the mid 20th century (not to mention antibiotics) must have seemed miraculous. I think we’ve lived without these diseases for so long that some people (stupid, selfish people) simply think they don’t exist or pose a threat any more.