The Final Solution too in Germany was a colossal waste of resources, in fact made them lose the war way faster. It completely undermined the entire German war effort.

Essentially, when you’re infected with measles, your immune system abruptly forgets every pathogen it’s ever encountered before – every cold, every bout of flu, every exposure to bacteria or viruses in the environment, every vaccination. The loss is near-total and permanent. Once the measles infection is over, current evidence suggests that your body has to re-learn what’s good and what’s bad almost from scratch. https://www.bbc.com/future/article/20211112-the-people-with-immune-amnesia