political correspondent there hans braun thanks so much hans. russian police have warned the activists not to join protests in support of the jailed opposition leader alexina downing security forces have sealed off parts of cities including st petersburg where demonstrations are planned nearly $4000.00 have been detained at rallies since the values arrest really of this month. russian or thora t's are determined to prevent any repeat of the mass protests which followed the arrest of our legs in a valid need much of sin petersburg has been barricaded against demonstrations planned for sunday officials warn they will crack down hard on troublemakers but that is the only yes the living interior ministry and other loren foresman units will use all necessary means to ensure public order. any violent action against offices or refusal to a bay their lawful orders will be prevented individuals who commit illegal acts will be detained and held accountable but he's got that. a must go to court has ordered novell his brother own leg and several other suppo

let's bring in our political correspondent hans braun he's on the story for us here in berlin and as i understand it german experts are not saying that this drug doesn't work for older people they're just saying there isn't sufficient data one way or the other. exactly obviously there were extensive studies done on the drug before it was licensed before it was accepted as being effective 1st studies involve tens of thousands of people many of them in brazil and in south africa and also in the united kingdom but the fact of the matter is that in that sample that was used for those studies. there were very few people of of an age somewhere over $65.00 it was somewhere around 5 percent of that sample and the german authorities are saying that's true little to be able to say with certainty that this vaccine will be effective for people in that age group and so they want to err on the side of caution and at the moment are recommending that it not be used for people above that age you know this really comes amid disputes between the e.u. and the british swedish manufacturer over supplies o