The people who several times had usual flu or several times passing vaccination, probably, are somewhat protected from a virus of swine flu, the American researchers reported. About it reports Reuters.
They found the proof of that the immune system of the person can partially distinguish the virus H1N1 which in something nevertheless is similar to seasonal viruses of flu.
"Swine flu is a little similar to ordinary flu that can say that the person already has a partial immunity against it. Probably, it can make a disease of less heavy among population bulk, than it was supposed earlier", - told Alessandro SETH, the head of the Center of infectious diseases in California.
Research also can help to explain why many elderly people not so hard have this disease, Allison DEKHAT - AUGUSTINE from National institute on studying of allergic and infectious diseases reported.
"Adults can have a partial immunity against H1N1", - she told.