As a Public Helath Nurse I was preparig to give a man a booster for Tetanus / Diphtheria. He said:
"I'm glad diphtheria is included in this vaccine. When I was young my older brother died from diphtheria and our whole family was under quarantine. I almost lost my other brother as well."
I often share this story with others when discussing some of the deadly diseases that many people forget about nowadays. And they are vaccine-preventable.