• Pediatric Infection and Vaccine
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• v.29 no.2
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• pp.61-69
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• 2022

Coronavirus disease 2019 (COVID-19) has been a global pandemic for over 2 years. During the Omicron (B.1.1.529) variant-predominant period in South Korea, confirmed cases among children and adolescents surged. This review found that, although younger children may be less susceptible to COVID-19 than adolescents, more research is needed on the role of children and adolescents in the disease's spread. Detailed epidemiological information about the transmissibility of the novel severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) strain in children and adolescents is currently scarce, and more research is needed on the role of children and adolescents in disease's spread. There may be a difference in the proportion of cases with severe disease requiring hospitalization depending on the dominant mutant strain; however, COVID-19 generally presents with a mild-to-moderate course in children aged 5-11 years old.

• Tuberculosis and Respiratory Diseases
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• v.85 no.4
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• pp.283-288
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• 2022

Asthma is a chronic inflammatory disease of the airways characterized by varying and recurrent symptoms, reversible airway obstruction, and bronchospasm. In this paper, clinical important studies on asthma published between March 2021 and February 2022 were reviewed. A study on the relationship between asthma and chronic rhinosinusitis, bronchiectasis, and hormone replacement therapy was published. A journal on the usefulness of fractional exhaled nitric oxide for the prediction of severe acute exacerbation was also introduced. Studies on the effect of inhaler, one of the most important treatments for asthma, were published. Studies on the control of severe asthma continued. Phase 2 and 3 studies of new biologics were also published. As the coronavirus disease 2019 (COVID-19) pandemic has been prolonged, many studies have explored the prevalence and mortality of COVID-19 infection in asthma patients.

• Proceedings of the Korean Society of Computer Information Conference
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• 2020.07a
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• pp.479-480
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• 2020

2020년 초 코로나바이러스감염증-19(COVID-19)로 인해 전 세계적으로 사회적 거리두기 가 권고 되면서, 많은 사람들이 집에서 소비 할 수 있는 콘텐츠로 IT 네트워크 서비스를 기반한 장르의 소비가 증가했고, 게임산업에서도 신규 이용자의 유입이 증가하고 있다. 이에 따라 본 논문에서는 코로나바이러스감염증-19(이하 COVID-19)로 혼란스러운 상황에서 게임이 어떤 역할을 할 수 있을지를 고찰해본다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2021.10a
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• pp.266-267
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• 2021

Recently, the COVID-19 Pandemic is not an infectious disease-level disaster, but a complex disaster, making it difficult to respond with traditional disaster response management methods. As a result, experiencing psychological stress and trauma such as COVID-19 has emerged as a new social problem. In preemptively predicting and effectively responding to these psychological disasters and crises, the necessity and direction of non-face-to-face disaster psychological support using ICT technology in traditional services are discussed.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2022.10a
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• pp.371-372
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• 2022

국내에서 다양한 규모와 종류의 화학사고가 지속 발생 중이며 이 중 초동대응 실패로 피해가 확산되는 경우도 발생하면서 이에 따른 화학사고 대응능력 향상에 대한 요구가 생기게 되었다. 그러나 이는 코로나 이전의 상황이며 2020년 이후에는 코로나 19로 인한 사회 여러 분야의 변화로 새로운 개념과 방법으로서 화학사고 대비와 안전에 있어 중요하게 고려할 사항이 생기게 되었다. 화학사고와 같은 특수 상황에 대비하여, 국가적으로 코로나 19 상황 하에서의 재난의료대응 인력에 대한 해당 재난 유형에 대한 교육훈련 프로그램 및 정책이 제공되어야 하며, 재난의료대응기관에서는 현장구조자 및 응급의료진 등 재난의료대응 전문 인력의 양성을 위한 코로나 19와 같은 신종 감염병을 대비한 상황 하에서의 지침 마련, 시스템 보완, 사전 교육이 시행되어야 한다.

• International Journal of Computer Science & Network Security
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• v.24 no.3
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• pp.71-82
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• 2024

This paper proposes a new communication system for e-learning applications to mitigate the negative impacts of COVID-19 where the online massive demands impact the current commu-nications systems infrastructures and capabilities. The proposed system utilizes high-altitude platforms (HAPs) for fast and efficient connectivity provision to bridge the communication in-frastructure gap in the current pandemic. The system model is investigated, and its performance is analyzed using adaptive antenna arrays to achieve high quality and high transmission data rates at the student premises. In addition, the single beam and multibeam HAP radio coverage scenarios are examined using tapered uniform concentric circular arrays to achieve feasible communication link requirements.

• IMMUNE NETWORK
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• v.21 no.1
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• pp.1.1-1.16
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• 2021

The emergence of a new severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic has become a significant health concern worldwide. Undoubtedly, a better understanding of the innate and adaptive immune responses against SARS-CoV-2 and its relationship with the coronavirus disease 2019 (COVID-19) pathogenesis will be the sole basis for developing and applying therapeutics. This review will summarize the published results that relate to innate immune responses against infections with human coronaviruses including SARS-CoV-1 and SARS-CoV-2 in both humans and animal models. The topics encompass the innate immune sensing of the virus to the dysregulation of various innate immune cells during infection and disease progression.

• IMMUNE NETWORK
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• v.20 no.4
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• pp.28.1-28.25
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• 2020

The recent emergence of the novel coronavirus (CoV) or severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) poses a global threat to human health and economy. As of June 26, 2020, over 9.4 million cases of infection, including 482,730 deaths, had been confirmed across 216 countries. To combat a devastating virus pandemic, numerous studies on vaccine development are urgently being accelerated. In this review article, we take a brief look at the characteristics of SARS-CoV-2 in comparison to SARS and Middle East respiratory syndrome (MERS)-CoVs and discuss recent approaches to coronavirus disease-2019 (COVID-19) vaccine development.

• East Asian mathematical journal
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• v.40 no.1
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• pp.119-125
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• 2024

Predicting the number of ICU patients holds significant importance, serving as a critical aspect in efficiently allocating resources, ensuring high-quality care for critically ill individuals, and implementing effective public health strategies to mitigate the impact of diseases. This research focuses on estimating ICU patient numbers through the development of a simple mathematical model. Utilizing data on confirmed COVID-19 cases and deaths, this model becomes a valuable tool for predicting and managing ICU resource requirements during the ongoing pandemic. By incorporating historical data on infected individuals and fatalities from previous weeks, we establish a straightforward equation. We found the substantial impact of the delay in infected individuals, particularly those occurring more than five weeks earlier, on the accuracy of ICU predictions. Proactively preparing for potential surges in severe cases becomes feasible by forecasting the demand for intensive care beds, ultimately improving patient outcomes and preventing excessive strain on medical facilities.

• Korean Journal of Community Nutrition
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• v.29 no.1
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• pp.65-80
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• 2024

Objectives: This study aims to compare changes in physical factors, health behaviors, eating habits, and nutritional intake among Korean male and female adults over a period of three years (2019-2021) before and after the outbreak of coronavirus disease 2019 (COVID-19). Methods: This study utilized raw data from the 8th Korea National Health and Nutrition Examination Survey (2019-2021). The participants in this study included 6,235 individuals in 2019, 5,865 individuals in 2020, and 5,635 individuals in 2021. Individuals whose daily energy intake was less than 500 kcal or exceeded 5,000 kcal were excluded from the study. Results: In comparison to 2019, overweight/obesity rates, weight, waist circumference, weekend sleep hours, and resistance exercise days/week increased in both male and female during the COVID-19 pandemic. Regarding eating habits, the proportions of people skipping breakfast, not eating out, consuming health supplements, and recognizing nutritional labels increased in 2020 and 2021, whereas the rate of skipping dinner decreased. Total energy intake has continued to decrease for the two years since 2019. A comparison of nutrient intake per 1,000 kcal before and after the outbreak of COVID-19 revealed that intake of nutrients, including protein, phosphorus, iron, vitamin A, riboflavin, and niacin increased, while folic acid intake decreased. In male, calcium, phosphorus, riboflavin, and niacin intakes increased, whereas iron, vitamin C, and folic acid intakes decreased. In female, phosphorus, iron, vitamin A, and riboflavin intake increased significantly, while protein and niacin intake decreased significantly. Conclusions: After COVID-19, the obesity rate, breakfast skipping rate, health supplement intake, and nutritional label use increased, while the frequency of eating out, dinner skipping rate, and total energy intake decreased. These environmental changes and social factors highlight the need for nutritional education and management to ensure proper nutritional intake and reduce obesity rates in the post-COVID-19 era.