EESA10H3 Lecture Notes - Lecture 7: Herd Immunity, Passive Immunity, Zoonosis
18 Mar 2016
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Document Summary
Human centric or host-centric approach may also be zoonosis (animal reservoir) The body"s defense against pathogens: immune system, vaccination + herd immunity. Vaccination is very useful, offers active immunity against passive immunity. Herd immunity: if enough members of a group are immune it is hard to maintain a chain of infection. Vaccinations are injected into our bodies to initiate anti-bodies to build to improve our immune system. People who survive ebola build herd immunity exposure to the disease will be difficult to spread if other"s have prior immunity. Segregation: isolation and quarantine = someone falls ill that person will be isolated from the community + isolation of everyone who was exposed to the sick. Vaccination: 1920"s jenner"s advent of vaccines to prevent illness. Antibiotics: many organism become resistant to antibiotics, creates serious health concerns as there is an overuse of antibiotics. Droplet transmission: coughing/sneezing, direct oral contact, transmission of fomite. Airborne transmission: air droplets (air circulation, wind)
