South Korea is reviewing AstraZeneca's request for approval of its coronavirus vaccine, as it expands a ban on private gatherings of more than four people to the whole country with daily cases topping more than 1,000 in four days.

South Korea's drug safety ministry said it will aim to approve the British shot for emergency use in 40 days. The approval would mark the first for the country, which has been grappling with a prolonged surge in infections during the latest wave that has led to a sharp increase in deaths.

South Korea signed a deal in December with AstraZeneca to secure 20 million doses of its vaccine, with the first shipment expected as early as January.