Instruct: Identify the main category of the given Medrxiv paper based on its title.
Query: Global research on syndemics: A meta-knowledge analysis (2001-2020)
Child and caregiver mental health during COVID-19
Mechanisms linking physical activity with psychiatric symptoms: a protocol for a systematic review.
Impact of immediate and preferential relaxation of social and travel restrictions for vaccinated people on the spreading dynamics of COVID-19 : a model-based analysis
High throughput wastewater SARS-CoV-2 detection enables forecasting of community infection dynamics in San Diego county
Low frequency of community-acquired bacterial co-infection in patients hospitalized for COVID-19 based on clinical, radiological and microbiological criteria; a retrospective cohort study.
Early Alveolar Epithelial Cell Necrosis is a Potential Driver of ARDS with COVID-19
The impact of hypoxia on B cells in COVID-19
The impact of mental health and substance use issues on COVID-19 vaccine readiness: a cross sectional community-based survey in Ontario, Canada
The impact of depression diagnosis on diabetes and lifetime hyperglycaemia
Baseline Characteristics and Outcomes of 180 Egyptian COVID-19 Patients Admitted to Quarantine Hospitals of Ain Shams University: A Retrospective Comparative Study
Diagnostic surveillance of high-grade gliomas: towards automated change detection using radiology report classification
Integrated miRNA/cytokine/chemokine profiling reveals immunopathological step changes associated with COVID-19 severity
Quantifying the relationship between SARS-CoV-2 wastewater concentrations and building-level COVID-19 prevalence at an isolation residence using a passive sampling approach
Loneliness among people with severe mental ill health during the COVID-19 pandemic: results from a linked UK population cohort study
Water, sanitation, and hygiene practices and challenges during the COVID-19 pandemic: a cross-sectional study in rural Odisha, India
Predicting brain amyloid-β PET phenotypes with graph convolutional networks based on functional MRI and multi-level functional connectivity
PROTOCOL: A cohort study examining the association between mirtazapine and mortality risk in adults with a diagnosis of depression
Cerebral venous thrombosis and portal vein thrombosis: a retrospective cohort study of 537,913 COVID-19 cases
The first GAEN-based COVID-19 contact tracing app in Norway identifies 80% of close contacts in "real life" scenarios.
Structural brain alterations associated with suicidal thoughts and behaviors in young people: results across 21 international studies from the ENIGMA Suicidal Thoughts and Behaviours consortium
Seroprevalence of anti-SARS-CoV-2 IgG antibody among health care workers of anaesthesia departments from various hospital settings in India
Screening of plasma IL-6 and IL-17 in Bangladeshi lung cancer patients
The genetic risk for COVID-19 severity is associated with defective innate immune responses
Virtual Delivery of Simulation Education to Undergraduate Medical Students During the COVID-19 Pandemic
Impact of COVID-19 on Pediatric Emergency Department Visits: A Retrospective Cohort Study.