Without treatment, about 50% of people with bubonic plague die. Almost all people with pneumonic plague die if not treated. Treatment reduces the mortality rates to 8-10%.
What to expect if I have Yersinia pestis infection  (Outlook/Prognosis)?
Without treatment, about 50% of people with bubonic plague die. Almost all people with pneumonic plague die if not treated. Treatment reduces the mortality rates to 8-10%.