LONDON—Having prepared for months to make its mark at this year’s Olympics, coronavirus variant B.1.525—a U.K. native best known for its skillful weakening of antibody responses—confirmed Thursday that it was excited to compete in Tokyo against top mutations from across the globe. “I can’t wait to travel to Japan this July and show the whole world what I’m capable of,” said the highly transmissible permutation of the SARS-CoV-2 virus, recounting how it had honed its spike proteins and vaccine resistance in anticipation of the international gathering of deadly pathogens. “I know South Africa, Brazil, and India will be bringing the heat, but I’m planning to have a big breakout moment myself. And if I’m not a household name by the closing ceremonies, well, there’s always the 2021 Sturgis Motorcycle Rally later in the summer.” Olympic bookmakers, observing that the United States is overdue to produce a highly lethal mutation, are reported to have the young California variants B.1.427 and B.1.429 favored in the spread.