German firm says there's no data showing 'that protection after the first dose is sustained after 21 days,' as some countries weigh move to allow more people to get inoculated

As the German biotechnology firm worked on a shot to defeat virus, other companies around the country already began organizing the infrastructure needed to deliver it to billions

Head of German pharmaceutical company says it will take another two weeks to get enough data to know for sure if inoculation effective against more contagious mutated strain

Companies say shot, if authorized for use, could be rolled out before end of year; German science minister says safety standards are being maintained

'I allowed myself to cry for the first time' when learning of the results, says Israeli chief medical officer as pharma firm asks regulators to allow emergency use of the jab

Medical personnel to be vaccinated first, with general population possibly facing winter with no immunization

BioNTech CEO Ugur Sahin, who is working with the US pharma firm to develop the vaccine, says 'we are working at full speed' to receive authorization to begin distributing shots

CEO of Pfizer partner Biontech says coming winter will be 'hard,' but by April, 300 million immunization units should be ready, which will have an impact on global pandemic