U.S.A. discovers: The persons who often catch a cold may flow to first and have immunity

U.S.A. discovers: The persons who often catch a cold may flow to first and have immunity
It cold now, the intersection of people and slightly careless getting easy cold. To this winter, often perhaps the person suffering from some little colds can a little " get good out of misfortune " Its sense. American researchers say on the 17th, often people who got influenza may have had certain immunity to first type H1N1 influenza in the past. Part of this discovery has explained the difficult reason for attacking the annual long crowd of first type influenza.
Discovery
This research is sponsored by national anaphylaxis and infectious disease research institute of U.S.A., the result of study is issued on institute's publication of American national academy of sciences.
"We find, first type H1N1 influenza and ordinary seasonal influenza have similarity, this may offer immunity of a certain degree for people, mean too this kind of disease is not perhaps so serious in the ordinary crowd, not so terrible as in imagination. " Infectious disease Alessandro, director of research center of research institute of La Jolla, California of U.S.A., fill in and specially say.
U.S.A. national anaphylaxis and the intersection of infectious disease and research institute end profit Dirk and Harte - Augustine full of trees think, perhaps this can explain why the old patient of less first type influenza present serious symptom. He says when being interviewed by telephone of reporter of Reuter: "Perhaps the adult has immunity sure to oppose the first type H1N1 influenza. "
First type H1N1 influenza spreads to 199 countries and regions in the world for the moment, infects millions of people. U.S.A. disease control and prevent from centre estimate new influenza cause death about 3900 people already in U.S.A. only.
Trace to the source
The antigen of influenza decide to form a cluster after Bjorn and Peters and colleague of the research institute of La Jolla have studied in the past 20 years, namely influenza and antigenic molecule which the human immune system can discern one " The mark " Or structure.
" we find, T cells of the immune system can discern quite a few of first type H1N1 influenza " The mark " . " Peters says in a statement.
The human immune system has " protects doubly " Ability. The antibody can prevent from infecting, T cell lower the symptom severity of disease after the infection.
Peters says, the recognition capability of immune system T cells may be accumulated with time, this explain why first type patient, influenza of H1N1, appear serious probability of symptom relatively little over the 50.
However, Peters has not found that react to the antibody of first type H1N1 influenza virus, this means antibodies may be unable to discern this kind of virus, can't prevent from infecting.
The expert still emphasizes, people must inoculate first type H1N1 influenza vaccine actively.
Variation
Will produce immunity after the human body is infected by influenza virus, but apt to make a variation because of influenza virus, previous immunity even " At one's wit's end " ,The human body will be infected repeatedly, so need to inoculate newly developed vaccine every year.
First type H1N1 influenza virus is brand-new H1N1 -type influenza virus of one kind. The ones that broke out in 1918 " Spain's influenza " Also a kind of H1N1 -type influenza. Thereafter, until 1957, seasonality that appear first type influenza " Spain influenza " Mutation of the virus.
U.S.A. medical expert find person who born have, resist first type the intersection of H1N1 and a certain antibody of influenza virus in the body before the some 1957 before this. This means, have gone through " Spain's influenza " And the crowd of mutation test, there may be immunity to H1N1 -type influenza virus in the body.
"This may explain why the child presents serious symptom more easily after receiving the infection. " The expert Dirk and Harte - Augustine says, " the time of their life is not long, they have not contacted different types of H1N1 influenza virus. "
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