Minnesota public health authorities confirmed Thursday what appears to be the second U.S. case of the omicron Covid variant in a resident who recently returned from New York City, the state’s department of health said. The man, who was fully vaccinated and has since recovered, traveled to New York City to attend the Anime NYC 2021 convention at the Javits Center from Nov. 19-21, the department said in a statement. The first omicron case was confirmed in California by U.S. officials Wednesday in a person who recently returned to San Francisco from a trip to South Africa. New York health...