>>514877450
He's exaggerating the effect, but the phenomenon is real. Essentially, unlike most viruses Measels specifically targets your immune system. A measels infection leaves you vastly more vulnerable to every other disease, even ones that you normally would never would have gotten sick from, for a period of months to years depending on severity. Measels itself almost never kills anyone, but the secondary infections following measels kill 100,000 people a year. And thats with measels largely being a non-issue virus we have contained.
A major measels outbreak is a bad time, representing not just one health crises but a promise of several more health crises in the near future because the people who got infected in the first one will continue to be vulnerable such that the common cold can send them to the hospital.