polio vaccine drops, 脊髓灰質炎疫苗滴

Quetta, Pakistan
A boy reluctantly takes polio vaccine drops from medical workers
Photograph: Naseer Ahmed/Reuters
Best photographs of the day: 'Hollyweed' and Afghan gamblers | World news | The Guardian
https://www.theguardian.com/world/gallery/2017/jan/02/best-photographs-of-the-day-hollyweed-in-los-angeles-and-afghan-gamblers