Japan has confirmed its first case of a Japanese national infected with the Omicron variant of the coronavirus, marking the third case in the country, government sources said Monday.The man in his 30s, who had traveled to Italy, was found to be infected with the heavily mutated variant after entering Japan through Tokyo's Haneda airport on Wednesday, according to the health ministry.He is fully vaccinated after receiving two doses of Moderna Inc.'s COVID-19 vaccine in July and August, the sources said.Prime Minister Fumio Kishida pledged Monday to "concentrate our limited medical resources …READ FULL ARTICLE