(CIDRAP News) To outside observers, the novel H1N1 virus spreading quickly to every corner of the globe must seem like it came out of nowhere, but the organism is a fourth generation of the 1918 pandemic virus and comes from an H1N1 family tree that is colorful and complex, according to two historical reviews that appear today in the New England Journal of Medicine (NEJM).
(CIDRAP News) At almost the same moment today that the World Health Organization announced recognition of an influenza pandemic, researchers from Hong Kong, the United Kingdom and the United States declared that the novel H1N1 virus responsible has been circulating undetected in humans for monthsand that its components have been present in pigs for at least a decade.
(CIDRAP News) Government officials and researchers may have underestimated the potential role of pigs as "mixing vessels" for influenza viruses and the importance of swine surveillance for identifying new pandemic threats, veterinary experts from Mexico asserted recently.
The World Health Organization (WHO) listed a global total of 2,500 confirmed cases of swine influenza H1N1 in 25 countries today. That total included 1,204 cases in Mexico, 896 cases in the United States (yesterday's number), 214 in Canada, 88 in Spain, and 34 in the United Kingdom. The death toll remains at 44, including 42 in Mexico and 2 in the United States. [WHO update 22]
(CIDRAP News) In their most detailed profile of H1N1 swine influenza cases so far, federal health officials reported today that only 5% of US patients were older than 50 and that 38% of patients had gastrointestinal problems, well above what's typical for seasonal flu.
The global illness count for the novel H1N1 swine influenza climbed to 2,099 confirmed cases with 44 deaths in 23 countries early today, the World Health Organization (WHO) reported. That included 1,112 cases and 42 deaths in Mexico and yesterday's US count of 642 cases and 2 deaths. Spain reported 73 cases and the United Kingdom 28. [WHO update 19]
(CIDRAP News) The World Health Organization (WHO) will convene a group of experts May 14 to advise the agency on whether to pull the trigger on production of a vaccine for the novel H1N1 swine influenza virus, a WHO official announced today.
The global count of confirmed H1N1 swine influenza cases rose to 1,658 in 23 countries, with 30 deaths, the World Health Organization (WHO) reported at a briefing today. Mexico continued to lead the list with 946 cases. [May 6 WHO swine flu update]