Literally every other common disease is either saturated to a somewhat stable level, or eliminated or on the way there because of some vaccine. Sadly, there are

Literally every other common disease is either saturated to a somewhat stable level, or eliminated or on the way there because of some vaccine. Sadly, there are some countries where HIV is still rapidly expanding, but in aggregate even that is shrinking. Currently covid-19 is the only epidemic that's large but still actively growing worldwide, it's the only one where we actually would see exponential growth if we do nothing.