(CIDRAP News) – Though flu activity is still below epidemic thresholds in most of the Northern Hemisphere, increases in areas such as Spain, northern Africa, and part of Canada suggest that the season is starting, the World Health Organization (WHO) said today.
(CIDRAP News) Flu activity remained low in the Northern Hemisphere last week, with only a few countries, such as Costa Rica and Cameroon, reporting spikes in the number of cases, the World Health Organization (WHO) said today.
Costa Rica is the only tropical country in the Americas to report increasing numbers of cases, which are primarily influenza A/H3N2, the WHO said.
(CIDRAP News) US health officials today gave a mixed report on influenza activity for last week, saying overall activity decreased slightly but more states reported widespread flu than the week before.
In Europe, meanwhile, flu activity increased in several countries, and the United Kingdom and Denmark reported high flu circulation, according to the World Health Organization's (WHO's) European Regional Office.
(CIDRAP News) Because of a suboptimal match between this year's flu vaccine and circulating influenza B viruses, the World Health Organization (WHO) has recommended changing one of the three strains used in flu vaccines for the Northern Hemisphere next fall and winter.