Malaria, ebolla, HIV, cholera and many more. Also add in the potential for antibiotics becoming less effective as evolution results in resistance to them. Evolution means change. Not all change is beneficial. Smallpox is one of only successfully eradicated diseases. Rinderpest is the other.
https://en.m.wikipedia.org/wiki/History_of_smallpoxImage makes a very good point about improved health care mitigating deaths.
