Instruct: Identify the main category of the given Medrxiv paper based on its title.
Query: High prevalence of previous infection with SARS-CoV-2 and persistent symptoms at a large university
Effect of Balloon-Blowing on Dyspnea and Oxygenation in Noncritical Adult Covid19 Patients: A Pilot Study
Early School Years follow up of the Asking Questions in Alcohol Longitudinal Study in Melbourne, Australia (AQUA at 6): Cohort profile
Seroconversion following SARS-CoV-2 Infection or Vaccination in Pediatric IBD Patients
Moral injury and wellbeing in essential workers during the Covid-19 pandemic: Local survey findings
Genetic effects on the timing of parturition and links to fetal birth weight
Modulating amygdala activation to traumatic memories with a single ketamine infusion
The Impact for Implementing Balanced Scorecard in Health Care Organizations: A Systematic Review
Genetic, structural and clinical analysis of spastic paraplegia 4
Assessing inertial measurement unit locations for freezing of gait detection and patient preference
Progressive changes in descriptive discourse in First Episode of Schizophrenia: A longitudinal computational semantics study
The effect of eye protection on SARS-CoV-2 transmission: a systematic review
Returning Actionable Genomic Results in a Research Biobank: Analytic Validity, Clinical Implementation and Resource Utilization
Establishment and preliminary evaluation of a teaching hospital-based dementia consultation service for rurally-based regional district general hospitals
Long Term Safety and Efficacy of Sub-Lingual Ketamine Troches / Lozenges in Chronic Non-Malignant Pain Management
COVID-19 Hospitalisation in Portugal, the first year: Results from hospital discharge data
Trends of Cutaneous Leishmaniasis, Western Ethiopia: retrospective study.
Alzheimer's disease variant portal (ADVP): a catalog of genetic findings for Alzheimer's disease
Low risk of SARS-CoV-2 transmission via fomite, even in cold-chain
A standardized approach for case selection and genomic data analysis of maternal exomes for the diagnosis of oocyte maturation and early embryonic developmental arrest in IVF
Allelic Variation in HLA-DRB1 is Associated with Development of Anti-Drug Antibodies in Cancer Patients Treated with Atezolizumab that are Neutralizing in Vitro
Incontinence and Healthcare Utilization of Medicare Patients
Mapping evoked fields in primary motor and sensory areas via magnetoencephalography in tetraplegia
Non-replication of structural brain changes from Mindfulness-Based Stress Reduction: Two combined randomized controlled trials
Excess mortality analysis for Germany for all three COVID-19 waves in 2020 - 2021
Use of repeated mammograms to evaluate risk of breast cancer: a systematic review of methods used in the literature