巴基斯坦去年用一种无针头注射器给居民注射霍乱伤塞菌苗,获得很大的成效。注射时,疫苗在很大的压力下被迫通过一个很小的孔,因此形成强有力的液流,能透过皮肤的表层。疫苗装在密闭的消毒系统中,这样就可以省去用普通带针头注射器进行接种时所需要的消毒手续。利用这种注射器,装药和注入疫苗只需要数秒钟。例如东巴基斯坦的两个医务人员用两具这种注射器在一天内给6759个男人、女人和儿童作了霍乱菌苗注射;而一个人用带针头的普通注射器在一天内只能 Last year, Pakistan injected a resident cholera vaccine vaccine using a needle-less syringe and achieved great results. At the time of injection, the vaccine is forced under a lot of pressure through a small hole, thus creating a powerful fluid flow through the skin’s surface. The vaccine is contained in a closed disinfection system, eliminating the need for disinfection when using an ordinary syringe with a needle. With this syringe, it takes only a few seconds to charge and inject the vaccine. For example, two medical staffs in East Pakistan used two such syringes to give cholera vaccine injections to 6,759 men, women and children in a single day; while a person with a syringe with a needle can only cholera in one day