Most researchers, Dr BBB among them, believed that an effective vaccine would need to be one capable of reproducing in the body as a wild virus would do. Their aim was to breed weak, or `attenuated`, types of the target virus that would be viable but harmless. Dr sss believed, on the basis of work with influenza vaccines, in an alternative approach.
之前都明,但尾尾幾句係講咩?
on the basis of work with influenza vaccines, in an alternative approach.