While you may prefer infectious diseases over redoing a high-school math exam, you should be aware that it is mathematics that helps us understand the spread of such diseases, helps us determine effective measures against this spread and, eventually, helps us control and constrain outbreaks and epidemics. Sure, the most advanced of these disease models require teams of specialised mathematicians to solve them as so many details need to be taken into account. For a bit of basic understanding, however, you don’t have to be a rocket surgeon. High-school math will pretty much do the trick. Read here about a bit of math to constrain epidemics.