Instruct: Identify the main category of the given Medrxiv paper based on the title.
Query: Effectiveness of COVID-19 Vaccines Against SARS-CoV-2 Infection During a Delta Variant Epidemic Surge in Multnomah County, Oregon, July 2021
Prospective genomic surveillance reveals cryptic MRSA outbreaks with local to international origins among NICU patients.
'When will this end? Will it end?' The impact of the March-June 2020 UK Covid-19 lockdown response on mental health: a longitudinal survey of mothers in the Born in Bradford study.
Air pollution exposure and mitochondrial DNA copy number in the UK Biobank
Prediction of individuals at high-risk of chronic kidney disease during treatment with lithium for bipolar disorder
Neurological manifestations of patients with mild-to-moderate COVID-19 attending a public hospital in Lima, Peru
Responsivity of the striatal dopamine system to methylphenidate - a within-subject I-123-β-CIT-SPECT study in children and adolescents with Attention-Deficit/Hyperactivity Disorder
Social cognition deficits and its biometric signatures in the behavioral variant of Alzheimer's disease
Improving the Prediction of Clinical Success Using Machine Learning
Safe in my heart: resting heart rate variability longitudinally predicts emotion regulation, worry and sense of safeness during COVID-19 lockdown
Regional Variation in COVID-19 Scarce Resource Allocation Protocols
Carbon dioxide, COVID-19 and the importance of restaurant ventilation: a case study from Spain approaching Christmas 2021
Effective vaccine allocation strategies, balancing economy with infection control against COVID-19 in Japan
Leaders gender and the fight against COVID-19: investigation, replication, and a possible explanation
Variation in COVID-19 excess mortality by age, sex, and province within Italy
When efficacy and adherence conflict: preferences and patterns of response to public health advice during the COVID-19 pandemic
Reverse causal effect of atrial fibrillation on 17 site-specific cancer risk: A Mendelian randomization study
Morphological, cellular and molecular basis of brain infection in COVID-19 patients
Quantification of abdominal fat from computed tomography using deep learning and its association with electronic health records in an academic biobank
Neuropsychiatric symptoms are associated with exacerbated cognitive impairment in covert cerebral small vessel disease
Violence and Non-fatal Injuries among Vietnamese In-school Adolescents: National Prevalence Estimates and Associated Factors
DICOM Imaging Router: An Open Deep Learning Framework for Classification of Body Parts from DICOM X-ray Scans
COVID-19 vaccine acceptance in older Syrian refugees: preliminary findings from an ongoing study
Effectiveness of gamified team competition in the context of mHealth intervention for medical interns: a micro-randomized trial
Sex Differences in the Incidence and Risk of Ankle-Foot Complex Stress Fractures Among U.S. Military Personnel
Brain lesion locations associated with secondary seizure generalization