Instruct: Identify the main category of the given Medrxiv paper based on the title.
Query: Quantitative Gradient Echo MRI Identifies Dark Matter as a New Imaging Biomarker of Neurodegeneration that Precedes Tissue Atrophy in Early Alzheimer Disease
Intraoperative microseizure detection using a high-density micro-electrocorticography electrode array
Nucleocapsid antibody positivity as a marker of past SARS-CoV-2 infection in population serosurveillance studies: impact of variant, vaccination, and choice of assay cut-off
COVID-19 onset reduced the sex ratio at birth in South Africa
Time needed to perform intermittent catheterization in adults with spinal cord injury: A pilot randomized controlled cross-over study
Blood transcriptional biomarkers of acute viral infection for detection of pre-symptomatic SARS-CoV 2 infection
Epicardial adipose tissue thickness is associated with increased COVID-19 severity and mortality
COVID-19 Vaccine's Gender Paradox
Evidence of co-infection during Delta and Omicron variants of concern co-circulation, weeks 49-2021 to 02-2022, France
IgA autoantibodies target pulmonary surfactant in patients with severe COVID-19
Assessment of AUC and fold change for precision medicine
Updating The Accuracy of Administrative Claims for Identifying Left Ventricular Ejection Fraction Among Patients with Heart Failure
Flying Without a Net: Space Radiation Cancer Risk Predictions without a Gamma-Ray Basis
Superantigenic TCR Vbeta 21.3 signature in Multisystem Inflammatory Syndrome in Children
Hilab system, a new point-of-care hematology analyzer supported by the Internet of Things and Artificial Intelligence
SARS-CoV-2 Infections in mRNA Vaccinated Individuals are Biased for Viruses Encoding Spike E484K and Associated with Reduced Infectious Virus Loads that Correlate with Respiratory Antiviral IgG levels.
Comparing the age and sex trajectories of SARS-CoV-2 morbidity with other respiratory pathogens points to potential immune mechanisms.
Automated measurement of the foveal avascular zone in healthy eyes on Heidelberg Spectralis Optical Coherence Tomography Angiography
Comparison of Anterior Nares Viral Loads in Asymptomatic and Symptomatic Individuals Diagnosed with SARS-CoV-2 in a University Screening Program
Low SARS-CoV-2 infection rate and high vaccine-induced immunity among German healthcare workers at the end of the third wave of the COVID-19 pandemic
The effect of body image dissatisfaction on goal-directed decision making in a population marked by negative appearance beliefs and disordered eating
Gaps in maternal, newborn, and child health research: a scoping review of 72 years in Ethiopia
Associations of DMT therapies with COVID-19 severity in multiple sclerosis
Navigating sample overlap, winner's curse and weak instrument bias in Mendelian randomization studies using the UK Biobank
Understanding the role of mask-wearing during COVID-19 on the island of Ireland
Risk of COVID-19 Reinfection and Vaccine Breakthrough Infection, Madera County, California, 2021