Oswaldo Cruz [famous Brazilian bacteriologist]: “Did you see, my dear Barata, how smallpox declined with the increase in vaccination?”
Barata Ribeiro [mayor of Rio de Janeiro, but as it happened, also trained as a physician]: “You are very mistaken! The epidemic has retreated in the face of my speeches.”
(O Malho, Rio de Janeiro, 1908)
Sic Transit Pestilentia 