Most will be inactivatedvirus vaccines made in eggs, some will be killed virus vaccines made in cell cultures and a few will be live attenuated virus vaccines.
多数是在鸡胚中生产的灭活病毒疫苗，一些是在细胞培养基中生产的灭活疫苗，还有几个减活病毒疫苗。
2
The inactivatedvirus vaccine does not have this side effect, but multiple doses are required in order to provide protection which may prove problematic in endemic areas.
灭活病毒疫苗没有此种副作用，要提供保护则需要多剂量，但在流行地区这可能证明是难以解决的。
3
Thiomersal is a compound used to prevent bacterial and fungal growth in some inactivated (in which the virus has been killed) vaccines provided to countries in multi-dose vials.