It takes a long time to develop a new vaccine. 仅clinical testing,就要phases : I (Safety), II (Efficacy- does it work) & III (Double blind studies)
可以为以后的预防做好了准备。
It takes a long time to develop a new vaccine. 仅clinical testing,就要phases : I (Safety), II (Efficacy- does it work) & III (Double blind studies)
可以为以后的预防做好了准备。
• 一期也可以是双盲的,,,有些作cross over,有 positive control -南侠- ♂ (0 bytes) () 01/23/2020 postreply 15:44:09