天花 smallpox o 1840 British vaccination Acts 1940 Smallpox was eradicated in europe and north america o 1960 Last Chinese case occurred in a Yunnan-Burma border village o 1967 WHO launched smallpox eradication movement At that time 30 million patients, 2 million death every year) 30 countries 1700 medical doctors 200,000 health worker Mobilized in the movement
天花 smallpox 1840 British vaccination Acts 1940 Smallpox was eradicated in Europe and North America 1960 Last Chinese case occurred in a Yunnan-Burma border village 1967 WHO launched smallpox eradication movement （At that time 30 million patients,2million death every year） 30 countries 1700 medical doctors 200,000 health worker Mobilized in the movement
天花 smallpox o Last natural infected Somalia patient cured in oct 261977 o afatal incidence occurred in Birmingham University in august 1978 a woman lab photographer Janet Parker became the last victim of smallpox prof Henry Bedson committed suicide o May 8, 1980 WHO announced Global eradication of smallpox Ali maal
天花 smallpox Last natural infected Somalia patient cured in Oct 26 1977 A fatal incidence occurred in Birmingham University in August 1978 a woman lab photographer Janet Parker became the last victim of smallpox, Prof Henry Bedson committed suicide. May 8, 1980 WHO announced: Global eradication of smallpox Ali Maali
天花 smallpo Reasons for possible eradication of smallpox o There are no other virus reservoirs but man o Only acute infection exists, the outcome of disease: die or life-long immunity o Virus is highly immunogenic, so vaccine has been most effective
天花 smallpox Reasons for possible eradication of smallpox There are no other virus reservoirs but man Only acute infection exists, the outcome of disease: die or life-long immunity Virus is highly immunogenic, so vaccine has been most effective
鼠疫 Plague bacterium 题 Yersinia Plague pestis bacteria in blood smear. Note safety pin appearance. Disease Control-and Prevention Ahttpww,cdc.govlncidodidvbidlplague/bacterium.htm aan,conm Prairie dog Flea Rat
鼠疫 Plague bacterium Yersinia pestis Prairie dog Flea Rat
Bubonic and Pneumonic Plague Bubonic plague Pneumonic plague 1. Entry 4. Exit (highly contagious) 3. Disease 3. Exit Buboes (highly contagious) (black hemorrhagic ymph nodes Pneumonia Internal organ hemorrhage 2. Disease Pneumonia 2. Spread ymphatic and systemic (usually 100% mortality) 1.Entry-bite of infected rat fiea
Bubonic and Pneumonic Plague