A vaccinated person transmits the weakened virus to others, who also develop antibodies to polio, ultimately stopping transmission of poliovirus in a community.

• 经过免疫接种的人将减毒活病毒传播给别人，这些人也产生一种脊髓灰质炎抗体，最终阻止脊髓灰质炎病毒在群体中传播。