Research recently published in the New England Journal of Medicine confirms the mosquito-borne Zika virus’ danger for pregnant women. Meanwhile, a study in Brazil suggests that a mosquito common in North America might also be capable of transmitting the virus. Pharmaceutical manufacturers are scrambling to create a Zika vaccine. But the slow pace of the vaccination development is feeding frustration – and raising questions about how policy balances drug safety with global health in the face of a pandemic. Read more