Large scale vaccine testing expected by July: NIH directorNIH Director Francis Collins said one or two COVID-19 vaccines could begin large-scale testing by July.

NIH Director Francis Collins said one or two COVID-19 vaccines could begin large-scale testing by July.http://feeds.foxbusiness.com/~r/foxbusiness/latest/~3/-8n2czIfJZ4/vaccine-testing-by-july-nih-director