你可能感兴趣的试题
51 of them were infected. 74 of them were infected All of them were infected 74 people die
Two earlier experimental vaccines. Tens of older vaccines. Placebo. Not mentione
A new experimental vaccine reduced by nearly a third the risk of contracting HIV. Scientists noted how the new vaccine regimen reduced the risk of HIV infection. Thailand is the largest area of HIV--negative men and women. Two older vaccines on their oven had not cut infection rates.
B strain of HIV. C strain. E strain. B and E strains.
It indicates that there is no risk of contracting HIV. It has for the first time cut the risk of HIV infection. It has instilled new hope in the HIV vaccine research field. It reduced by nearly a third the risk of infecting Aids.
湘公网安备 43130202000226号