INFLUENZA A (H1N1)
Cases of a novel subtype of influenza, A/H1N1, were first detected in Mexico and the United States of America in April 2009. Since then, cases of this infection were reported in a number of countries resulting in increased concern about the emergence of a new influenza pandemic.
The new subtype is believed to have emerged from a mix of swine, human and avian influenza viruses. Using laboratory diagnostic methods, scientists are able to track the spread of the virus between countries in real-time and to better understand the evolution of the new strain.
The World Health Organization has been supporting Member States in the response to the outbreak of this novel influenza virus. Key priorities are the investigation of spread worldwide including evidence of person-to-person transmission, the geographic distribution of disease, the clinical spectrum of disease, and the effectiveness of mitigation strategies. As new information arises, risk assessments are conducted to determine the current pandemic alert phase and to maximize coordination between countries in the overall effort to control the disease.
H1N1 now in the post-pandemic periode
WHO recommendations for the post-pandemic periode
Surveillance recommendations in the post-pandemic periode