The wife (L) of the H7N9 bird flu patient surnamed Zhang (2nd R) shakes hands with a medical staff member at the Zaozhuang Municipal Hospital in Zaozhuang City, East China's Shandong Province, March 16, 2013. Zhang has recovered from the disease as the first H7N9 bird flu infection in Shandong Province. (Xinhua/Sun Zhongzhe) 

The H7N9 bird flu patient surnamed Zhang (2nd R) and his wife (3rd R) walk out of the Zaozhuang Municipal Hospital with medical staff members in Zaozhuang City, East China's Shandong Province, March 16, 2013. Zhang has recovered from the disease as the first H7N9 bird flu infection in Shandong Province. (Xinhua/Sun Zhongzhe) 

The H7N9 bird flu patient surnamed Zhang (R) receives flowers from a medical staff member at Zaozhuang Municipal Hospital in Zaozhuang City, East China's Shandong Province, March 16, 2013. Zhang has recovered from the disease as the first H7N9 bird flu infection in Shandong Province. (Xinhua/Sun Zhongzhe) 

The H7N9 bird flu patient surnamed Zhang (R) walks out of the Zaozhuang Municipal Hospital in Zaozhuang City, East China's Shandong Province, March 16, 2013. Zhang has recovered from the disease as the first H7N9 bird flu infection in Shandong Province. (Xinhua/Sun Zhongzhe)

The H7N9 bird flu patient surnamed Zhang (R) walks out of the Zaozhuang Municipal Hospital in Zaozhuang City, East China's Shandong Province, March 16, 2013. Zhang has recovered from the disease as the first H7N9 bird flu infection in Shandong Province. (Xinhua/Sun Zhongzhe)