ants

I do get some interesting questions. How about this one? “Why in Central Europe did we as kids put a straw on an anthill, wait for the ants to crawl over it, and then suck it for its sour taste? My mother did it and lived to 93!”
The flu reminds us that humans, as social creatures, are more susceptible to contagious disease than more solitary species. But do other social species treat contagion differently and could there be evolutionary insights to discover?