The U.S. Centers for Disease Control, for instance, use a scale similar to a five-point hurricane index, with the Spanish Flu (which killed upwards of 50 million people in 1918-19) at the low end of five.The CDC hasn't yet determined where the H1N1 outbreak lies on that scale, said Dr. Francisco Averhoff, chief of quarantine and border health services in the division of global migration and quarantine.
12 May 2009 -- As of 06:00 GMT, 12 May 2009, 30 countries have officially reported 5251 cases of influenza A(H1N1) infection.
Mexico has reported 2059 laboratory confirmed human cases of infection, including 56 deaths. The United States has reported 2600 laboratory confirmed human cases, including three deaths. Canada has reported 330 laboratory confirmed human cases, including one death. Costa Rica has reported eight laboratory confirmed human cases, including one death.
The following countries have reported laboratory confirmed cases with no deaths - Argentina (1), Australia (1), Austria (1), Brazil (8), China (2, comprising 1 in China, Hong Kong Special Administrative Region, and 1 in mainland China), Colombia (3), Denmark (1), El Salvador (4), France (13), Germany (12), Guatemala (1), Ireland (1), Israel (7), Italy (9), Japan (4), Netherlands (3), New Zealand (7), Norway (2), Panama (16), Poland (1), Portugal (1), Republic of Korea (3), Spain (95), Sweden (2), Switzerland (1) and the United Kingdom (55).
WHO is not recommending travel restrictions related to the outbreak of the influenza A(H1N1) virus.
Individuals who are ill should delay travel plans and returning travelers who fall ill should seek appropriate medical care. These recommendations are prudent measures which can limit the spread of many communicable diseases, including influenza.
Further information on the situation will be available on the WHO web site on a regular basis.
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