People infected with the Omicron variant of SARS-CoV-2 are nearly 75 percent less likely to develop serious illness or die than those who contract the Delta variant, real world data released on Monday by the South Korean health authorities showed.
A study by the Korea Disease Control and Prevention Agency (KDCA) of about 67,200 infections confirmed since December showed that the Omicron variant’s severity and death rates averaged 0.38 percent and 0.18 percent respectively, compared with 1.4 percent and 0.7 percent for Delta variant cases.
The KDCA classed severe cases as people who were hospitalized in intensive care units.
About 56 percent of 1,073 people who died over the past five weeks were either unvaccinated or had received only one dose, the study showed, with people aged 60 or older accounting for 94 percent of deaths.
More than 86 percent of South Korea’s 52 million population have been double vaccinated and nearly 60 percent have received a booster shot.
South Korea had kept cases and deaths relatively low thanks to widespread social distancing measures, and aggressive testing and tracing.
The Omicron variant has led to a surge in cases — daily new infections topped a record 100,000 last week — but authorities have pushed ahead with slightly easing social distancing rules amid a lower fatality rate and ahead of a presidential election next month.
Contact tracing and mandatory isolation for vaccinated people was scrapped in favor of self diagnosis and at-home treatment to free up medical resources.
Among changes to strict curfews, restaurants are to be open for an extra hour for groups of up to eight diners, up from six.
The long-running curfews have emerged as a political hot potato ahead of the election, with small business owners urging them to be lifted, while some experts warn of likely strain on the healthcare system.
The KDCA said Omicron became the dominant variant in the third week of last month and up to 90 percent of new cases were the Omicron variant by the first week of this month.
The KDCA reported 99,444 new cases on Monday, bringing total infections to 2,157,734, with 7,508 deaths.
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