The H7N9 bird flu outbreak in China killed at least 43 people this year . Until now , it was thought that all the infections came from birds . The virus has caused 132 human infections resulting in 43 deaths since February , Chinese state media reported last month . But a new study suggests that some of those infected may have been infected by humans as well. It says the limited case shows the virus has `` potential for pandemic spread ''
The H7N9 bird flu outbreak in China killed at least 43 people this year . Until now , it was thought that all the infections came from birds . But a new study suggests that some of those infected may have been infected by humans as well. It says the limited case shows the virus has `` potential for pandemic spread ''