A possible area of research is the identification of other forms of immunostimulatory or targeted agents that when given in combination with the vaccine may optimize the vaccineeffect.
一个可能的研究领域是其他免疫刺激形式或当疫苗联合给药时可能使疫苗效应发挥得更完善的靶因子的辨认。
2
The association should be strong in the magnitude of the association (in an epidemiological sense), and in the dose-response relationship of the vaccine with the adverse effect.
相关性的强度应该达到一定联系强度水平(从流行病学的角度来看)，并且副反应与疫苗存在剂量-反应关系。
3
The Mexican study can give us only an estimate of the effect of vaccination, as there could be other things that influenced the death rates from diarrhoea, apart from the introduction of the vaccine.