AIDSresearcherssaytheystillhavemuchworktodoonavaccine(疫...
问题详情：AIDSresearcherssaytheystillhavemuchworktodoonavaccine(疫苗)againstHIV.Butthefirstreportsofsomesuccesshaveraisedhopes. 1 Thestudywasdesignedtotestfortwoabilities.Onewastheabilityoftheva...