That's really good news, and that would fit with what we've seen outside of Mexico. The (H1N1)pdm09 virus was very different from H1N1 viruses that were circulating at the time of the pandemic. It also said there was significant flu activity in virtually all states, which was considered to be quite unusual for this time of year. As of late August, 100 had been hospitalized in intensive care units and 28 had died since the beginning of the outbreak in April. In the spring of 2009, scientists recognized a particular strain of flu virus known as H1N1. Less often, someone infected with swine flu passes the infection to others. So far it's looking like it's not that serious.In the United States, the majority of the 70 National Respiratory and Enteric Virus Surveillance System (NREVSS) laboratories do not report the influenza A subtype.In early October 2009, the Centers for Disease Control and Prevention announced that swine flu was widespread across the country. There was particular worry about pregnant women. Both clusters, detected in the UK (including Wales) and in North Carolina, occurred in a single ward and involved patients whose immune systems were severely compromised or suppressed. Technically, the term "swine flu" refers to influenza in pigs. The viruses are 80–120 nanometres in diameter.
That illness infected between 700 million and 1.4 billion people worldwide but only had a mortality rate of 0.02%. [...] I'm really eager to know how much worse this is than seasonal flu. The nation’s most recent fight was in 2009 when the H1N1 virus, also called swine flu, appeared in the U.S. and spread quickly across the world. United States Earliest known onset of a USA case later confirmed as swine flu, that of a nine-year-old girl residing in Imperial County, California. H1N1 flu is also known as swine flu.It's called swine flu because in the past, the people who caught it had direct contact with pigs. Swine flu; Synonyms: Pig influenza, swine flu, hog flu, pig flu: Electron microscope eemage o the reassorted H1N1 influenza virus photographed at the CDC Influenza Laboratory. Later that April, both the World Health Organization and the Obama administration declared a public health emergency. The influenza A variant subtype H1N1 is commonly the cause of swine flu in humans. Occasionally, pigs transmit influenza viruses to people, mainly to hog farmers and veterinarians. Few young people had any existing immunity (as detected by antibody response) to the (H1N1)pdm09 virus, but nearly one-third of people over 60 years old had antibodies against this virus, likely from exposure to an older H1N1 virus earlier in their lives.