细胞-1

[自然要览]（选自英国Nature杂志，2006年1月5日出版）封面故事：蜜蜂行为方式的演化起源Complex social...不知道。现在Schmitt等人报告，Wnt3（一个最近被发现是轴突引导线索的蛋白家族中的一员）是一个在地形图的形成中与ephrinB1相反的力

After decades of focusing almost exclusively on treating HIV, public health experts are now considering a new approach, moving to establish more effective prevention strategies to curb spread of the disease. Recent tests show that anti-HIV drugs that can hamper the growth of the virus responsible for AIDS may also prevent progression of the disease if given to infected individuals soon after their exposure to HIV. The same drugs can also prevent infections from taking hold among healthy people who are exposed to the virus; both approaches would be critical ways of controlling spread of the virus and keeping new cases of HIV to a minimum.\r\n\r\nRead more: http://healthland.time.com/2012/11/21/recommendations-for-routine-hiv-testing-represent-advances-in-preventing-hiv/#ixzz2CripWt9p

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