“Overall I do not think vaccines are effective”5%10%15%20%25%“Vaccinesare notimportantforchildrentohave”0%10%ChinaChinaIndiaIndiaUnited StatesUnited StatesIndonesiaIndonesiaBrazilBrazilNigeriaNigeriaRussiaRussiaMexicoMexicoPhilippinesPhilippinesUkraineUkraineBosnia and HerzegovinaBosnia and HerzegovinaGreeceGreeceAfricaAsiaEuropeNorth AmericaOceaniaSouth America1.2B1.2B400M400MDots sized byPopulation(historicalestimates)