European Union medical authorities on Monday recommended a second booster vaccination against the coronavirus for those aged over 60 to counter a fresh wave of Covid-19 breaking over Europe. The Stockholm-based European Centre for Disease Prevention and Control (ECDC) and the Amsterdam-based European Medicines Agency (EMA) said the second booster – effectively the fourth jab – should be considered for those aged between 60 and 79, as well as those with pre-existing medical conditions putting them at risk of severe disease. The two authorities had recommended a second booster to those 80 and ol…