Studies in Japan
Trends in the stage distribution of colorectal cancer during the COVID-19 pandemic in Japan: a nationwide hospital-claims data analysis
（全国診療情報データベースを用いた日本におけるコロナ禍の大腸がんステージ分布の傾向）
Impact of the COVID-19 pandemic on cancer death locations in Japan: an analysis up to February 2023 on excess mortality
（日本におけるCOVID-19パンデミックががん死亡場所に及ぼす影響：2023年2月までの超過死亡に関する分析）
Effectiveness of BNT162b2 against infection, symptomatic infection, and hospitalization among older adults aged ≥65 years during the Delta variant predominance in Japan: The VENUS Study
（デルタ株流行期の高齢者における感染、症候性感染、入院に対する新型コロナワクチンBNT162b2の有効性評価: VENUS Study）
Changes in accelerometer-measured physical activity and sedentary behavior from before to after COVID-19 outbreak in workers
（勤労者における加速度計で測定した身体活動および座位行動のCOVID-19流行前後での変化）
Variant-specific symptoms after COVID-19: a hospital-based study in Hiroshima
（SARS-CoV-2流行株別にみたCOVID-19罹患後症状：第二種感染症指定医療機関における縦断研究）
Effectiveness of BNT162b2 vaccine against symptomatic SARS-CoV-2 infection in children aged 5−11 years in Japan during Omicron variant predominate periods
（オミクロン株流行期の日本における5〜11歳小児の有症状SARS-CoV-2感染に対するBNT162b2ワクチンの有効性）
Epidemiologic trends and distributions of imported infectious diseases among travelers to Japan before and during the COVID-19 pandemic, 2016 to 2021: a descriptive study
（COVID-19流行前後の訪日渡航者における輸入感染症の疫学的動向と分布（2016～2021年）：記述的研究）
[Letter} Antibody titers after a third and fourth SARS-CoV-2 vaccine dose in Bizen City, Japan
Patient characteristics and public health office factors associated with long reporting delay of COVID-19 cases in Sapporo City, Japan
（札幌市における新型コロナウイルス感染症の報告遅延に関連する患者特性および保健所要因の分析）
Mortality-associated Risk Factors in Hospitalized COVID-19 Patients in Japan: Findings of the CLOT-COVID Study
（日本における入院中のCOVID-19患者の死亡予測因子：CLOT-COVID Studyからの報告）
[Letter] Adverse Reactions and Attitudes Toward the BNT162b2 COVIT-19 Vaccine in Children 5 to 11 Years of Age in Japan
The Unusual Increase in Suicides Among Women in Japan During the COVID-19 Pandemic: A Time-series Analysis Until October 2021
（日本のCOVID-19流行下における女性の自殺者増加：2021年10月までの時系列解析）
[Letter] Response to the Letter to the Editor Regarding “Serologic Survey of IgG Against SARS-CoV-2 Among Hospital Visitors Without a History of SARS-CoV-2 Infection in Tokyo, 2020–2021”
[Letter] Seropositivity for SARS-CoV-2 in a General Population: How Specific Is the Diagnostic?
[Letter] Association Between Fever and Antibody Titer Trends After a Third Dose of the mRNA-1273 Vaccine
[Letter] Impact of the First–Fourth Waves of the COVID-19 Pandemic on New Applications for Long-term Care Insurance in a Metropolitan Area of Japan
We Should Pay More Attention to Sex Differences to Predict the Risk of Severe COVID-19: Men Have the Same Risk of Worse Prognosis as Women More Than 10 Years Older
（COVID-19の重症化リスクを予測するために男女差にもっと注目すべきである：男性の重症化リスクは10歳以上年上の女性と同等）
Inter-prefectural Travel and Network Connectedness During the COVID-19 Pandemic in Japan
（日本におけるCOVID-19パンデミック時の都道府県間移動とネットワーク指標）
Influence of the COVID-19 Pandemic on Overall Physician Visits and Telemedicine Use Among Patients With Type 1 or Type 2 Diabetes in Japan
(COVID-19が日本の1型糖尿病患者および2型糖尿病患者における受診や遠隔診療利用に及ぼした影響について)
Persistence of Mental Health Deterioration Among People Living Alone During the COVID-19 Pandemic: A Periodically-repeated Longitudinal Study
（COVID-19 パンデミック下における独居者のメンタルヘルス悪化の遷延：定期的な繰り返し縦断研究）