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epa09607061 Cologne fans cheer in the stands stand close together prior to the German Bundesliga soccer match between FC Koeln and Borussia Moenchengladbach in Cologne, Germany, 27 November 2021. The spread of a new potentially more dangerous variant of coronavirus in southern Africa has caused international concern. Experts fear that the B.1.1.529 Coronavirus variant Omikron could be highly contagious because of an unusually large number of mutations and could also penetrate the protective shield of vaccines more easily. The National Academy of Sciences Leopoldina recommends immediate comprehensive contact restrictions in view of the dynamic corona infection incidence. These would also have to apply to vaccinated and genesis. EPA/SASCHA STEINBACH