Covid-19: South Korea prime minister calls for calm as cases hit new record

South Korea's prime minister on Wednesday called on people not to panic about a major increase in coronavirus infections as new daily cases surged past 170,000 for the first time.

Serious cases and deaths are at manageable levels despite record cases caused by the highly infectious Omicron variant, Prime Minister Kim Boo-kyum told a pandemic response meeting.

"Although our awareness and implementation of anti-Covid rules should not be loosened, there is no reason at all to fear or panic about the numbers of new cases as in the past," he said, according to a transcript.

South Korea reported 171,452 new coronavirus cases for Tuesday, another daily record and a sharp increase from 99,573 a day before, the Korea Disease Control and Prevention Agency said on Wednesday.

Deaths have slowly ticked up, reaching a near-record high 99 on Tuesday, but South Korean authorities say real-world data shows people infected with the Omicron coronavirus variant are nearly 75 per cent less likely to develop serious illness or die than those who contract the Delta variant.

A study by the Korea Disease Control and Prevention Agency (KDCA) of some 67,200 infections confirmed since December showed the Omicron variant's severity and death rates averaged 0.38 per cent and 0.18 per cent, respectively, compared with 1.4 per cent and 0.7 per cent for the Delta cases.

Around 56 per cent of 1,073 people who died over a five week period were either unvaccinated or had received only one dose, the study showed, with people aged 60 or older accounting for 94 per cent of deaths, officials said on Monday.

More than 86 per cent of South Korea's 52 million population have been double vaccinated and nearly 60 per cent have received a booster shot.

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Children should get one-third of the regular dose, administered twice with a three week interval, the ministry said in a statement. Children with significantly declined immunity can get a booster four weeks later.

South Korea has reported a total of 2.3 million cases since the pandemic began, with 7,607 deaths.