Three factors of transmission of infectious disease Source of infection (Typhoid Mary, 52/7) 受感染的人 Susceptible population 带菌者 .Transmission routes 直接接触 飞沫传染 Direct (1米以内 (1米以外) touch 间接接触 Droplet通过用具传布 Air -borne昆媒介 (媒介) spittle Indirect Indirect insect touch utensils Routes of transmission Speedof sneeze 170km/h 47.2/s
Routes of transmission Three factors of transmission of infectious disease •Source of infection (Typhoid Mary, 52/7) •Susceptible population •Transmission routes Direct touch Indirect touch Droplet spittle Indirect utensils Air-borne insect Speed of sneeze: 170km/h 47.2m/s
Victories over infectious diseases ◆ Smallpox ◆ plague ◆ affluenza ● Diphtheria Measles o Tetanus o poliomyelitis o schistosomiasis
Victories over infectious diseases Smallpox plague Influenza Diphtheria Measles Tetanus poliomyelitis schistosomiasis
天花 smallpox 天花病毒 poxviridae orthopoxvirus 的ADAM pockmarked face, from maculopapular rash to Braised fluid-filled blisters topustules
天花 smallpox 天花病毒 poxviridae othopoxvirus pockmarked face，from maculopapular rash to raised fluid-filled blisters to pustules
天花 smallpox ◆ Egyptian Pharaoh Ramses v died from smallpox in B. C ◆ Frequent outbreak in the history 300 million people died from smallpox in 20th century(100 million died from wars) Ramses v1157 BC
天花 smallpox Egyptian Pharaoh Ramses V died from smallpox in1157 B.C Frequent outbreak in the history 300 million people died from smallpox in 20th century (100 million died from wars) Ramses V 1157 BC
Victims of S Smallpox Louis xv 1777 世祖顺治皇帝 Elizabeth 1533-1603 OR 33 Joseph I d1711 顶治1638-1661 Marry ll1662-1694
Victims of Smallpox Louis XV 1777 Elizabeth I 1533-1603 Joseph I d1711 顺治 1638-1661 Marry II 1662-1694