This is nitpicking, but I guess which disease bears the title depends on how you define it. I remember seeing some estimate that malaria has killed ~40% of all humans that have ever lived.

Rabies has a nearly 100% kill rate. It's just rare that someone does get infected.

good data; thanks.

i realize "deadliest" could be evaluated both as "least curable" and "most killed", which are definitely different things.