Measles have surged because of COVID. They talk about children, but it hits adults really hard, as I recall. I’m assuming elderly populations are particularly vulnerable.
https://www.sciencealert.com/measles-cases-surged-80-this-ye…
Measles cases have surged by nearly 80 percent worldwide this year, the UN said Wednesday, warning that the rise of the "canary in a coal mine" illness indicates that outbreaks of other diseases are likely on the way.