mink farms in the northern part of the country, which authorities say could evade future COVID-19 vaccines.To prevent human contagion, the government ordered the culling of the entire mink population of 17 million in Denmark, one of the world's biggest mink pelt producers.Here's what's known about the Danish strain:Denmark has identified five variants of the virus stemming from mink, but only one - known as Cluster 5 - showed "reduced sensitivity" towards antibodies, according to Denmark's State Serum Institute (SSI), which deals with infectious diseases.State epidemiologist Kare Molbak said cluster 5 was not more dangerous than other strains or more infectious.Clusters 2, 3 and 4 are still being studied for reduced sensitivity, which has.