Experts say they have found key component of the H5N1 bird flu virus . Many countries have stockpiled both vaccines and antiviral medications , for such a scenario . It is hoped this will lead to better medication to fight the infection . China reported its first human - to - human transmission in 2002 . Since then , the World Health Organization has confirmed no human cases .
Experts say they have found key component of the H5N1 bird flu virus . It is hoped this will lead to better medication to fight the infection . China reported its first human - to - human transmission in 2002 . Since then , the World Health Organization has confirmed no human cases .