Word: virus
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...Given the lack of clarity over the threat posed by the virus, that's perhaps understandable. But gauging the impact of the outbreak - for markets and economies just as for health officials - takes time. Should the virus's potential for a pandemic be realized, though, its financial impact would be severe. As with the outbreak of severe acute respiratory syndrome (SARS), which devastated the Asian economy in 2003, economic consequences would be measured "not so much in the number of people that go down with it, or unfortunately are killed by it," says Justin Urquhart Stewart, investment director at Seven...
...Though the World Health Organization (WHO) is referring to the situation as a "public-health emergency of international concern," the apparent emergence in several countries of an entirely new strain of H1N1 flu virus has led some scientists to believe that it is only a matter of time before the WHO declares pandemic status, a move that could prompt travel bans to infected countries. "We are clearly seeing wide spread," says Michael Osterholm, a pandemic risk expert who runs the University of Minnesota's Center for Infectious Disease Research and Policy. "There is no question." (See a photogallery on swine...
...public-health emergency is part of what federal officials termed an "aggressive response" to the outbreaks. In addition to releasing from the national stockpile some 12.5 million doses of the antiviral drugs Tamiflu and Relenza - which scientists say has so far been effective against the H1N1 swine flu virus - the Department of Homeland Security will begin "passive surveillance" to screen people entering the U.S. Any traveler coming from a country with a confirmed human swine flu infection will be questioned, checked for symptoms and potentially isolated if they are found ill. Though the CDC has issued public warnings about...
...influenza virus is constantly mutating. That's why we can't get full immunity to the flu, the way we can to diseases like chicken pox, because there are multiple strains of the flu virus and they change from year to year. However, even though the virus makes us sick, our immune systems can usually muster enough of a response so that the flu is rarely fatal for healthy people...
...every once in awhile, the virus shifts its genetic structure so much that our immune systems offer no protection whatsoever. (This usually happens when a flu virus found in animals - like the avian flu still circulating in Asia - swaps genes with other viruses in a process called reassortment, and jumps to human beings.) A flu pandemic occurs when a new flu virus emerges for which humans have little or no immunity and then spreads easily from person to person around the world. In the 20th century we had two mild flu pandemics, in 1968 and 1957, and the severe "Spanish...