(Undated) -- It's realistic not to expect any concerts until 2021. That's what Doctor Ezekiel Emanuel thinks, anyway. Doctor Emanuel, a special advisor with the World Health Organization, was speaking with a panel of experts and the New York Times recently, said he doesn't think it will be safe to have concerts, sporting events or other big public gatherings for at least another 18 months. He explained that the economy has to be restarted in stages, and that social distancing has to be maintained for a period of time.