A COVID-19 variant that first emerged in Colombia in January is rapidly spreading in the United States, according to health experts. The variant, also known as B.1.621, currently accounts for some 10 percent of cases that were genetically sequenced at the University of Miami’s pathology lab last week, reported news station WPLG. “In the last week, 10 percent of our patients had the Colombian variant. Why? Because of the travel between Colombia and Miami,” Jackson Memorial Health CEO Carlos Migoya told ABC affiliate WPLG. The spread of the emerging variant is “a real shocking thing,” Migoya said. According to the World Health Organization (WHO), the first case of the variant was recorded in Colombia in January. The variant has been designated by the WHO as one that requires “further monitoring.” It hasn’t yet been assigned a letter of the Greek alphabet—something the agency said would simplify discussion and pronunciation while …