八喜妈，帮你查了查，这是一段可以解释的文字，说明频繁打防疫针的害处，

来源: Churchill 于 2013-03-07 20:45:25 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (2152 bytes)
本帖于 2013-03-11 00:18:06 时间, 由普通用户 宠物论坛版主 编辑
回答: Punia 摊上事了 急需帮助 由 猫狗都有 于 2013-03-07 17:03:36

Some other potential problems are more serious. One of the biggest worries is that frequent stimulation of the immune system can increase the risk of “immune-mediated diseases”. These are diseases caused when the body’s immune cells attack normal body cells. There is a theory that in rare cases, over-vaccination can over-stimulate immune cells, which go haywire and start attacking everything, including normal body cells. Keep in mind that there are many causes of immune-mediated diseases. 

http://www.i-love-dogs.com/forums/dog-health-nutrition/32765-aware-what-can-happen-too-much-vaccinations.html

但是以上信息并不是来自于权威的网站，只能让你了解过于频繁的防疫针会引来什么后果。注射疫苗现在已经称为了一个有争议的话题，World Small Animal Veterinary Association这个组织从2010年开始考虑减少犬类核心疫苗的种类和注射频率。

听听你的Vet怎么说吧。密切观察Punia

祝福

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