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预防接种的目的是通过接种某种菌苗、疫苗或类毒素等到人的机体中,通过免疫反应,使机体对这些传染病具有一定的免疫能力,从而可以避免或减少传染到这些传染病的机会。先天性心脏病是由胚胎时期心脏、大血管的发育畸形所造成的一种器质性心脏病。预防接种本身并不会使心脏畸形进一步发展,但某些预防接种以后可能会出现一些轻重不等的反应。这些反应包括局部的和全身的反应。一般说来局部反
The purpose of immunization is to prevent or reduce the chances of transmission to these infectious diseases through vaccination of certain bacterins, vaccines or toxoids into the human body and through the immune response so that the body has a certain immunity to these infectious diseases . Congenital heart disease is an organic heart disease caused by the developmental abnormalities of the heart and large blood vessels in the embryonic period. Vaccination alone does not further the development of heart malformations, but some immunizations may range in severity after some vaccinations. These reactions include both local and systemic reactions. In general, local anti