@hillaryclinton: I had the most wonderful visit in Harlem yesterday with my friend Dr. Gao Yaojie, who's simply one of the bravest people I know. As a practicing physician in the China in the 1990s, Dr. Gao discovered that HIV/AIDS was being transmitted to patients via blood tran...全文: http://m.weibo.cn/5896921323/4349359720005876