 South Korea began its coronavirus vaccine rollout for people aged 18 to 49 on Thursday. It aims to give at least one dose to 70% of the population and fully vaccinate 50% by September. South Korea reported 20 COVID-19 deaths for Wednesday and this is the highest daily count of this year. The number of severe cases more than doubled since the current and worst wave of infections began in July. The country has been struggling to boost its immunization drive that began in February. It had supply shortages and shipment delays with about 52.7% of its 52 million people haven't received at least one dose, just 26% are fully vaccinated.