@greggwbarnes @benny171a @TrumpUndead @jonathanchait Even vaccinated people do get measles, polio, etc. when there is an outbreak. When you're a high risk of exposure you're advised to get a booster.
@greggwbarnes @benny171a @TrumpUndead @jonathanchait 即使是接种疫苗的人在爆发时也会感染麻疹、脊髓灰质炎等。当您的暴露风险很高时，建议您进行助推器。