Denmark and the United States (US) are among six countries that have reported new coronavirus cases linked to mink farms, the World Health Organization (WHO) said.Italy, the Netherlands, Spain and Sweden are the other nations to have discovered SARS-CoV-2 in minks, the WHO said in a statement.Denmark has imposed strict measures on the north of the country after warning that a mutation of the virus had jumped from minks to humans and infected 12 people.Copenhagen has warned the mutation could