32 Susceptible Vaccination game 32 Vaccinated 32 Susceptible Vaccination game Vaccinated Susceptible Infected N S E W Remove to create first case Vaccinated Susceptible Infected N S ID: 1042948
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1. Vaccination game
2. 32 Vaccinated32 SusceptibleVaccination game
3. 32 Vaccinated32 SusceptibleVaccination game
4. VaccinatedSusceptibleInfectedNSEW
5. Remove to create first caseVaccinatedSusceptibleInfectedNSEW1
6. NSEW Remove to create first case Infect susceptible neighboursVaccinatedSusceptibleInfected1
7. NSEW Remove to create first case Infect susceptible neighbours Repeat until epidemic overVaccinatedSusceptibleInfected122
8. NSEW Remove to create first case Infect susceptible neighbours Repeat until epidemic overVaccinatedSusceptibleInfected122333
9. NSEW Remove to create first case Infect susceptible neighbours Repeat until epidemic overVaccinatedSusceptibleInfected1223334444
10. NSEW Remove to create first case Infect susceptible neighbours Repeat until epidemic over Record total casesVaccinatedSusceptibleInfected
11. NSEW Remove to create first case Infect susceptible neighbours Repeat until epidemic over Record total cases Try with 48 vaccinated/16 notVaccinatedSusceptibleInfected
12. R0 measures how quickly an epidemic will take off…R0 < 1Cases decrease each stepR0 > 1Cases increase each stepReproduction number (R0)?
13. Herd immunity
14. Proportion of the population we need to vaccinate:Herd immunityR0R0-1 • Rabies 0• Flu 1–2• Ebola (West Africa) 1–2• Chickenpox 10• Measles 16–18
15. Proportion of the population we need to vaccinate:Herd immunityR0R0-1 R0 Vaccinate• Flu 1–2 1/2• Ebola (West Africa) 1–2 1/2• Chickenpox 10 9/10• Measles 16–18 17/18