(CIDRAP News) – Influenza activity continued its early-season upward trend in the United States last week, while the flu season showed some signs of getting under way in Europe. In addition, US investigators found another case of swine-origin H3N2 flu, this one in a Minnesotan who has recovered.
(CIDRAP News) – Flu activity in the United States rose substantially last week, hitting the national baseline at the earliest point in the season since the 2003-04 flu season, and the first case of variant H3N2 (H3N2v) since September has been reported from Iowa, the US Centers for Disease Control and Prevention (CDC) reported today.
(CIDRAP News) – With this year's big outbreak of swine-origin H3N2 influenza apparently over, a leading flu expert at the Centers for Disease Control and Prevention (CDC) says extensive contact with pigs seems to have been the key risk factor and that very few cases had clear signs of human-to-human transmission.
(CIDRAP News) – Researchers report that swine and human influenza A/H3N2 viruses associated with an Ohio county fair held in July make a nearly perfect genetic match, suggesting that there is almost no biological barrier to prevent such viruses from passing between humans and pigs.
(CIDRAP News) – Researchers who spent the past 3 years testing pigs for influenza A viruses at county fairs in Ohio found that infected animals commonly appear clinically normal, highlighting one of the challenges health officials faced in preventing the spread of variant influenza to humans at fairs this summer.
(CIDRAP News) – Eleven of 16 hospitalized US cases of variant H3N2 (H3N2v) swine-origin influenza this past summer occurred in Ohio, and 10 of those were in children, according to a report that also suggests that even healthy people stay away from pigs at fairs to avoid flu infection.
(CIDRAP News) – The World Health Organization (WHO) is recommending that influenza vaccines for the Southern Hemisphere's 2013 flu season should contain the same three strains as the vaccines now being administered to millions in the Northern Hemisphere.
(CIDRAP News) – An investigation of one of the first swine-origin H3N2 influenza cases detected in the United States in 2011 suggests that for each confirmed case, there may be many more that go undetected.
(CIDRAP News) – The number of swine-origin H3N2 (variant H3N2, or H3N2v) influenza cases in the United States has climbed by 9 in the past week, to 305, and another rare swine-origin variant, H1N1v, has cropped up in Missouri, the Centers for Disease Control and Prevention (CDC) reported today.