Waldemar Haffkine's Vaccine

Origin
Waldemar Haffkine was a Russian bacteriologist who developed a successful anti-cholera vaccine he employed in India, and later a formula to fight bubonic plague. Lacking enthusiastic test subjects, Haffkine tested the vaccines upon himself. He used each type to inoculate thousands in India against the lethal diseases, most of whom survived because of the treatment.

Effects
Cures devastating diseases like cholera and the bubonic plague while also removing other conditions, such as muscular deformities and heavy metals. Normally harmless conditions such as allergies and the flu have their potency increased, making them temporarily lethal to the patient.