I think this is a biological weapon experiment gone wrong, maybe it was unintentionally set free, eg. lab accident etc . That is why there was an attempt to cover up the news from the Chinese public and the world. Likely, the creator of the virus had not managed to create a vaccine yet and he himself may had been a victim of the virus. Thus, the attempt to cover up the epidemic in China.
Another interesting obeservation is that Ajmerican seems to be tough, they have not seen any casuaLTY ALTHOUGH THERE ARE CASES THERE.