There’s a promising development in the search for a coronavirus vaccine. A small-early stage testing is working how scientists have hoped. Researchers say every single one of the volunteers who was part of the first COVID-19 vaccine tested in the U.S. showed an immune response. Researchers plan to do a 30,000 person study, here within the next couple of weeks.  Dr. Robert Redfield of the CDC, says if everyone wears a mask, the pandemic might be under control within four to eight weeks.