Covid vaccine is being used in various Russian regions, with medical workers considered the priority. As per the federal information monitoring system, there are more than 27,000 marked packages of the vaccine so far.Stay home: Moscow mayor tells elderly as virus reboundsMoscow Mayor Sergei Sobyanin on Friday ordered the elderly to stay at home and recommended employers allow home working after the Russian capital saw a sharp rise in virus cases.Sobyanin's message came after virus figures that had remained steady for several months climbed steeply in recent days in Russia, the world's fourth most affected country, and particularly in Moscow, where current case numbers are the highest since late June.Sobyanin said Muscovites over 65 years.