H1N1 flu (swine flu): Can you catch it twice?

davidnew1967

After being infected with the 2009 swine flu virus, one can't catch the same virus again — not from you, not from anyone else. All flu viruses are that way. Once you're exposed to a flu virus, your immune system develops antibodies and memory cells unique to that virus. Your body can then defend itself if you're exposed to the virus again. This system of defense is known as acquired immunity. You also acquire immunity to flu viruses when you get a flu shot or take the nasal flu vaccine.
If having the flu or getting vaccinated gives you immunity, why is the 2009 swine flu (H1N1) virus such a problem? And why get a seasonal flu shot every year?
The short answer: Flu viruses rearrange their DNA all the time; it's how they survive. So, while one is now immune to influenza caused by the 2009 swine flu virus, other flu viruses can still make them sick, as can many noninfluenza viruses, including those that cause colds and pneumonia.

chy

kao dajia yingyu?

光衣

読み難いな～～

wingcyb

只看懂大概，反正就是流感无法防治

岩武

￥¤￠★→■§

davidnew1967

4# wingcyb While the priest climbs a post, the devil climbs ten, but man can conquer nature !

davidnew1967

kao dajia yingyu?
fukein 发表于 2009-11-11 08:47

                               
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No, 本文大意是：得过感冒的人因自身可以产生抗体，使自己不再患同种感冒，但病毒基因也就是DNA可以从组变异，这样，人类就有可能因此患另一种感冒，但是，我们要相信人定胜天， 再加上我们自身加强锻炼，应该可以避免侵袭。与君共勉！