Delta Variant Breaks Through Vaccinated Individuals... Numerous Challenges Including Holiday Season and Pandemic Fatigue

Global Concern Over Delta Variant Spread
US CDC: "The Nature of the COVID-19 Battle Has Changed"

Social Distancing Adjustments to Be Announced This Week for Implementation Next Week
Authorities: "If Spread Does Not Slow, 'Stronger Measures' Will Be Considered"

On the 2nd, as 1,219 new COVID-19 cases were reported, bringing the total number of confirmed cases to over 200,000, citizens waiting to get tested are seen at a temporary screening clinic set up at Sinchon Station on the Gyeongui Line in Seodaemun-gu, Seoul. Photo by Jinhyung Kang aymsdream@

The persistent spread of the fourth wave of COVID-19 is largely attributed to the Delta variant, which has become the dominant strain domestically. The most stringent social distancing measure, Level 4, has been in effect in the metropolitan area for over three weeks, and Level 3 is applied in non-metropolitan areas. However, the situation remains difficult, with authorities having to settle for merely preventing further escalation. The health authorities have repeatedly hinted at the possibility of implementing "stronger quarantine measures" after monitoring the situation this week, but there are no effective options readily available.

◆ The spread does not subside with the ‘stronger’ Delta variant = According to health authorities on the 2nd, the number of new COVID-19 cases in the country last month, when the fourth wave hit, reached around 40,000. This accounts for 20% of the total confirmed cases over the 1 year and 7 months since the pandemic began, concentrated within a single month. Although the peak of the fourth wave has not yet passed, the total number of patients has already surpassed that of the third wave, which lasted over two months (from November 13 last year to January 20 this year).

South Korea is not alone in struggling with the resurgence of COVID-19. As the Delta variant has become dominant in major countries worldwide, the global number of confirmed cases is rapidly increasing again. With the acceleration of COVID-19 vaccinations, the daily new cases worldwide, which had dropped to the 200,000 range in June, surged to the 600,000 range by the end of last month. According to predictive models from the Institute for Health Metrics and Evaluation at the University of Washington, the United States, which recently recorded daily cases in the 100,000 range, could see up to 300,000 new cases per day in August, a grim forecast.

An internal document from the U.S. Centers for Disease Control and Prevention (CDC) described the recent situation as a "complete change in the war against COVID-19." According to the CDC, the Delta variant is more transmissible than the Spanish flu. The Spanish flu was a highly contagious disease that caused 50 million deaths in Europe over two years in the early 1900s. The Delta variant is estimated to infect 5 to 9 people per patient, whereas the original COVID-19 virus infected 2 to 4 people.

The Delta variant also poses a higher risk of breakthrough infections. The CDC analyzed 469 confirmed cases related to an event held from July 3 to 17 in Barnstable County, Massachusetts, and found that 74% of those infected were fully vaccinated. Among 133 samples analyzed, 89.5% were confirmed to be infected with the Delta variant.

Breakthrough infection cases are also increasing domestically. As of the 22nd of last month, there were 779 breakthrough infection cases, equivalent to 14.1 per 100,000 people. Among 226 cases analyzed for variants, major variants were confirmed in 72 cases, with the Delta variant accounting for the highest proportion at 54 cases.

◆ Numerous ‘hidden obstacles’ such as fatigue and vacation season = Experts diagnose that controlling the fourth wave has become more difficult than during the first to third waves, as the detection rate of the Delta variant has surged to the 50% range domestically. The accumulated fatigue from over a year and a half of the COVID-19 crisis is also a problem. Despite the unprecedentedly strong social distancing system of Level 4 in the metropolitan area and Level 3 in non-metropolitan areas, the spread has not been contained, coinciding with the vacation season.

Last week (July 25?31), the average daily number of confirmed cases was 1,506, which is even higher than the previous week's 1,465. The infection reproduction number remains above 1 at 1.04. Particularly, the balloon effect, where the outbreak spreads from the metropolitan area to non-metropolitan areas, has become evident, turning many parts of the country into minefields. According to Korea Expressway Corporation, 530 vehicles were recorded on highways nationwide on the 30th of last month, the highest summer vacation traffic volume in the past decade. On that day, non-metropolitan areas accounted for 34.9% of the total confirmed cases.

The health authorities are deeply concerned as they must announce adjustments to social distancing measures, effective from the 9th of this month. Although the concentrated vacation period of late July to early August will end this week, the holiday season around Liberation Day may continue the vacation rush a week later. Prime Minister Kim Boo-kyum indicated the possibility of additional measures, stating, "If the spread does not reverse, we cannot rule out stronger quarantine measures."

Professor Jung Jae-hoon of the Department of Preventive Medicine at Gachon University Gil Medical Center emphasized, "With the emergence of the Delta variant, it is difficult to expect that vaccinating 70% of the entire population will immediately block the outbreak, but vaccines remain the only option." He added, "We must expedite vaccination completion for high-risk groups as much as possible and plan booster shots for high-risk groups by the end of this year or early next year." As of midnight on that day, only 13.9% of the domestic population had completed COVID-19 vaccination.

This content was produced with the assistance of AI translation services.