South Korean opposition leader Lee Jae-myung, widely seen as the front-runner in a presidential by-election triggered by the removal of President Yoon Suk Yeol last week over his ill-fated imposition of martial law, officially announced his presidential bid on Thursday, vowing to heal a starkly divided nation through economic growth.

Thousands of junior doctors in South Korea are a week into a labor boycott in protest of the government’s push to recruit more medical students to cope with the country’s fast-aging population.