One of the most confusing features of the outbreak of swine flu is that unlike the seasonal flu, mostly severe disease does not occur in the elderly . The US Centers for Disease Control and Prevention (CDC) plans to publish a detailed report which said that some elderly people have antibodies that react to the new H1N1 virus behind the swine flu.
The head of the flu CDC, Nancy Cox, discussed in an interview published on Science Insider last week, but Morbidity and Mortality Weekly Report from the CDC more later today or tomorrow will have a detailed report of the results.
One reason that older people may have antibodies is exposure to an older strain of swine flu cousin. At a press conference today, CDC epidemiologist Daniel Jernigan noted that between the pandemics of 1918 and 1957, an H1N1 distributed in the United States seems to have left some people with an antibody response that in laboratory studies "cross-react" with the new H1N1 virus. "This does not mean something that speaks to you protection," warned Jernigan. "We can conclude that to a certain extent where there is some level of protection, but we are not a good answer to this question right now. "
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