The first case reported was a Mexican who flew in from Shanghai .
The Food and Health Bureau of Hong Kong issued travel advice for Mexico on 26 April 2009 , which advised Hong Kong residents not to travel to Mexico unless absolutely necessary .
The first case reported was a Mexico who flew in from Shanghai .
The Food and Health Bureau of Hong Kong issued travel advice for Mexico on 26 April 2009 , which advised Hong Kong residents not to travel to Mexico unless absolutely necessary .