Thursday marks the first day of COVID-19 vaccinations for people under 50 in South Korea.
Inoculations for 18 to 49 year olds began nationwide, with some 11 million people scheduled to get their first dose over the next five weeks.
Those getting the jab this week will receive the Pfizer vaccine, with shots alternating with Moderna in the weeks to come, depending on supply.
And as rollout begins for the country's largest age bracket, authorities hope the mass inoculation will take first dose coverage to 70 percent of the population by the Chuseok holiday in September.
It aims to administer second doses by the end of October to reach its target of 70 percent herd immunity.
In terms of statistics, more than 27 million have received their first doses so far nearly 53 percent of the nation.
That number will be rising daily with this age group starting to get their first doses.