2 sentences

1. 他在四岁时患上了小儿麻痹症。

   tā zài sì suì shí huàn shang le xiǎo'ér​má​bì​zhèng.

   He contracted polio at the age of four.

   Source: CCMatrix

2. 疫苗已经消灭了天花，几乎消灭了小儿麻痹症。

   yì​miáo yǐ​jing xiāo​miè le tiān​huā, jī​hū xiāo​miè le xiǎo'ér​má​bì​zhèng.

   Vaccines have eradicated smallpox and nearly eradicated polio.

   Source: CCMatrix