Those rapid mutations mean the virus tends to develop a resistance to any widely used medication . Experts say they have found key component of the the World Health Organization bird flu virus . It is hoped this will lead to better medication to fight the infection . France reported its first human-to-human infection in 2005 . Since 2005 , H5N1 has confirmed Nearly two-thirds human cases .
Experts say they have found key component of the the World Health Organization bird flu virus . It is hoped this will lead to better medication to fight the infection . France reported its first human-to-human infection in 2005 . Since 2005 , H5N1 has confirmed Nearly two-thirds human cases .