The number of bird flu cases in China jumped Sunday to 102, including 20 deaths, the World Health Organization announced. Seventy patients remain hospitalized with the virus. The WHO said there is still no evidence of human-to-human transmission. So far the virus has mainly affected eastern China, with 11 deaths and 33 infection cases reported in Shanghai, 24 cases, including three deaths, in Jiangsu Province, 38 cases, including five deaths, in Zhejiang Province, while Anhui Province has confirmed three cases, with one ending in death. Further afield, four people -- including one in Beijing in northern China and three in central Henan Province -- have tested positive for the H7N9 virus, according to a report of CNN.