基因疫苗是有许多优点的新型疫苗,有可能预防艾滋病、疟疾和其它当前各种免疫技术均无效的破坏性感染,甚至还有助于治疗癌症。疫苗作为现代医学最伟大的成就虽然仍有争议,但它们已消灭了天花,把脊髓灰质炎推向了灭绝的边缘,而且使无数的人免于斑疹伤寒、破伤风、麻疹、甲肝、乙肝、轮状病毒和其它危险性感染。不过,有些疫苗仍有缺点,导致较多的致死或 Gene vaccines are novel vaccines with many advantages that make it possible to prevent devastating infections that are not effective against AIDS, malaria and other current immunization techniques and even to help treat cancer. Vaccines, the greatest achievements of modern medicine, are still controversial, but they have eliminated smallpox and pushed poliomyelitis to the verge of extinction, leaving countless people free from typhus, tetanus, measles, hepatitis A and B. Rotavirus and other dangerous infections. However, some vaccines still have shortcomings, leading to more lethality or