知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。 WHO is carefully monitoring the outcomes of ongoing research to assemble evidence. Vaccine candidates in opposition to herpes simplex virus, chlamydia and gonorrhoea are in early medical advancement, while All those against syphilis and trichomoniasis remain within the pre-medical section. 2 Mari - you rock, thanks. In https://hc6.org/