Gu Fangzhou has a nickname, "grandpa sugar pill".
顾方舟有一个别名，叫做“糖丸爷爷”^nWjw]XO,&d^Iri。
He developed an oral vaccine that has prevented countless children from contracting polio.
他研发了一种口服疫苗，使得无数儿童免遭小儿麻痹症的侵害rkvZYVj|_I。
In the 1950s, Gu Fangzhou was in his 30s, he was assigned to a project researching a vaccine for polio.
20世纪50年代，30多岁的顾方舟被指派研究小儿麻痹症疫苗yxZ-j3RCzJg4I3htKJL。
In 1960, the team he was leading successfully developed China's first domestic inactivated polio vaccine.
1960年，他领导的团队成功研制出了中国国内首批小儿麻痹症灭活疫苗[&|QLS)IKxt.%0+4。
But before it could go into widespread use, it had to be tested on children.
但在广泛使用之前，该疫苗必须要先在儿童体内进行测试LGLaWPSZ*3q。
Gu Fangzhou's eldest son was the first to try it.
于是，顾方舟的大儿子就成为了第一个测试者O]nA*+3F#K7h-6。

After a period of observation, to the delight of Gu Fangzhou and his colleagues, the oral vaccine was deemed safe.
经过一段时间的观察，让顾方舟和他的同事们高兴的是，该口服疫苗被认为是安全的4.7fKN~Upv。
In 1965, a nationwide campaign was launched to vaccinate against polio.
1965年，一场全国性的小儿麻痹症疫苗接种运动展开了6juvP,m_za&BP。
In 1978, the sugar pill vaccine was included in the prescribed immunizations for children.
1978年，该糖丸疫苗正式纳入了儿童处方免疫3W*|!).~|eqJ-2)qt。
In October 2000, the World Health Organization declared that China was polio-free.
2000年10月，世界卫生组织宣布中国为无小儿麻痹症国家JYpfWM9cW-OsKQ5yM&oL。
In 2013, the application rate of 11 vaccines, including those for hepatitis B, BCG and polio for children, reached 90 percent in rural areas.
2013年，在农村地区，包括乙肝、卡介苗、小儿麻痹症等在内的11种疫苗，普及率达到了90%kZ+#U-S2oNL3_~ZF。