Background The increasing burden of pneumonia in adults is an emerging health issue in
the era of global population aging. This study was conducted to elucidate the burden of …

Background The serotype-specific effectiveness of 23-valent pneumococcal polysaccharide
vaccine (PPV23) against pneumococcal pneumonia has not been established in people …

Coronavirus disease 2019 (COVID-19) by infection with severe acute respiratory syndrome
coronavirus 2 (SARS-CoV-2) typically causes febrile illness with respiratory symptoms (1, 2). …

Objective To identify common features of cases with novel coronavirus disease (COVID-19)
so as to better understand what factors promote secondary transmission including …

We analyzed 3,184 cases of coronavirus disease in Japan and identified 61 case-clusters
in healthcare and other care facilities, restaurants and bars, workplaces, and music events. …

Background Although several COVID-19 vaccines initially showed high efficacy, there have
been concerns due to waning immunity and the emergence of variants with immune escape …

Background Aedes aegypti , the major vector of dengue viruses, often breeds in water
storage containers used by households without tap water supply, and occurs in high numbers …

OBJECTIVE: To examine the association between gestational weight gain and maternal body
mass index (BMI) among Vietnamese women and the risk of delivering an infant too small …

Background: The interplay between nasopharyngeal bacterial carriage, viral coinfection, and
lower respiratory tract infections (LRTIs) is poorly understood. We explored this association …

After a typhoon in September 2009, an outbreak of leptospirosis occurred in Metro Manila,
the Philippines; 471 patients were hospitalized and 51 (10.8%) died. A hospital-based …