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August 20, 2010. WHO Issues H1N1 Update

SOURCE:World Health Organization

The situation in New Zealand and India remains largely unchanged since the last update. Influenza H1N1 (2009) virus transmission remains locally intense in parts of India and New Zealand.

In New Zealand, during the first week of August 2010, the national consultation rate for ILI** increased sharply. Influenza H1N1 (2009) virus transmission appears to be locally intense in parts of the country that were less affected during last winter's pandemic wave; however, to date, the overall national rate of ILI consultations and the numbers of severe and fatal cases of H1N1 (2009) remain below levels observed during the 2009 winter pandemic wave. The majority of influenza viruses detected during the current winter epidemic have been H1N1 (2009).

In India, community transmission of H1N1 (2009) remained active and moderately intense in several states, most notably in the states of Maharashtra but also in several other western and southern states (Gujarat, Andhra Pradesh, Karnataka, and Tamil Nadu). Between mid-June 2010 and the second week of August 2010, the state of Maharashtra reported consecutive weekly increases in the number of new cases, including numbers of new fatal cases; the epidemic does not appear to have peaked in Maharashtra but the rate of increase in the numbers of new cases appears to have slowed. The epidemic appears to have stabilized or begun to decline in several other affected states. Seasonal influenza B viruses are also known to be currently circulating in India, although at lower levels than H1N1 (2009) viruses.

Except in South Africa and New Zealand, overall influenza activity and rates of respiratory diseases remained low in other countries of the temperate southern hemisphere (Australia, Chile, and Argentina). In South Africa, active circulation of seasonal influenza H3N2 and type B viruses was observed during June through mid-August 2010. In Argentina, there are unconfirmed media reports of localized influenza outbreaks in at least one part of the country.

Copyright © 2010, World Health Organization


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