South Korea aims to inoculate a fifth of its population against COVID-19 by the end of the second quarter.
That means having at least 10.4 million people receive their first shot by June.
Officials hope this would stem the spread if current prevention measures are also maintained.
The final goal is vaccinating 70 percent of the population by September to create herd immunity by November.
Experts say in the case of COVID-19,it takes 70 percent of people with antibodies to protect the population.
Employees at special-education schools and nurses at kindergartens to high schools will get the AstraZeneca vaccine nationwide starting Thursday.