Students of Fudan University rest during the observation time after being injected with the vaccine against the A/H1N1 flu in Shanghai, east China, on December 23, 2009. The vaccination campaign against the A/H1N1 flu virus was launched in late November among colleges and universities in Shanghai. Some 37 percent of 640,000 students and teachers here have already consented to receive the vaccine injections. [Xinhua]