八喜媽，幫你查了查，這是一段可以解釋的文字，說明頻繁打防疫針的害處，

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

但是以上信息並不是來自於權威的網站，隻能讓你了解過於頻繁的防疫針會引來什麽後果。注射疫苗現在已經稱為了一個有爭議的話題，World Small Animal Veterinary Association這個組織從2010年開始考慮減少犬類核心疫苗的種類和注射頻率。

聽聽你的Vet怎麽說吧。密切觀察Punia

祝福