Yeah. HIV is a good example of this. Without treatment, it is deadly pretty much 100% of the time. However, it takes a long time after the shut down of the immune system before a systematic infection takes over and kills you.
That allowed for a deadly disease that's somewhat hard to spread (mostly just through sex) to ultimately go on a rampage.
That allowed for a deadly disease that's somewhat hard to spread (mostly just through sex) to ultimately go on a rampage.