Zika Outbreak Could Be Over in 3 Years, Study Predicts

The current Zika outbreak taking place in much of South and Central America will be largely over in three years' time, a new study predicts. "The current explosive epidemic will burn itself out due to a phenomenon called herd immunity," Neil Ferguson, a professor of mathematical biology at Imperial College London's School of Public Health, said in a statement. "Because the virus is unable to infect the same person twice — thanks to the immune system generating antibodies to kill it —