A child is vaccinated in Jiegu Town of northwest China's quake-hit Yushu Prefecture, on May 3, 2010. Over 2,500 children aged 0 to 12 have been vaccinated against measles, parotitis, rubella and hepatitis B so far in Yushu. A total of 6,000 to 7,000 children will be vaccinated. [Xinhua]