Instruct: Identify the main category of Medrxiv papers based on the titles.
Query: REACT-1 round 9 interim report: downward trend of SARS-CoV-2 in England inFebruary 2021 but still at high prevalence
Step forward in epidemiological modeling: Introducing the indicator function to capture waves
Seroprevalence of anti-SARS-CoV-2 IgG antibodies in Juba, South Sudan: a population-based study
Predicting Olfactory Loss In Chronic Rhinosinusitis Using Machine Learning
Early effectiveness of COVID-19 vaccination with BNT162b2 mRNA vaccine and ChAdOx1 adenovirus vector vaccine on symptomatic disease, hospitalisations and mortality in older adults in England
Blood transcriptomic biomarkers of alcohol consumption and cardiovascular disease risk factors: the Framingham Heart Study
Risk Score Stratification of Alzheimer's Disease and Mild Cognitive Impairment using Deep Learning
Demographic Characteristics and Clinical Features of COVID-19 Patients Admitted in a Combined Military Hospital of Bangladesh
The "Great Lockdown": Inactive Workers and Mortality by Covid-19
Prevalence of Specific Multimorbidity Combinations and Association with Medical Expenditures and Perceived Health among U.S. Adults, 2016-2019
Simple Scoring Tool to Estimate Risk of Hospitalization and Mortality in Ambulatory and Emergency Department Patients with COVID-19
A second dramatic rise in seroprevalence rates of SARS-CoV-2 antibodies among adult healthy blood donors in Jordan; have we achieved herd immunity?
SARS-CoV-2 incidence and risk factors in a national, community-based prospective cohort of U.S. adults
T1/T2 Ratio Imaging Improves Cortical Lesion Contrast in Multiple Sclerosis on 3T MRI
Social gradients in health vary between rural and urban Turkana
SARS-CoV-2 neutralizing antibodies in Chile after a vaccination campaign with five different schemes
Genome-wide association meta-analysis of childhood and adolescent internalising symptoms
Epidemiological Analysis of Lower Limb Revascularization for Peripheral Arterial Disease over 12 years in the Public Health System in Brazil
Selective Decontamination of the Digestive Tract in Invasively Ventilated Patients in an Intensive Care Unit: A protocol for a Systematic Review and Meta-Analysis
Genomic dissection of the bacterial population underlying Klebsiella pneumoniae infections in hospital patients: insights into an opportunistic pathogen
Preliminary report on the development of a colorimetric loop-mediated isothermal amplification diagnostic assay for deer tick virus
Statistical Analysis Plan for the Helmet Non-Invasive Ventilation for COVID-19 Patients (Helmet-COVID) Randomized Controlled Trial
Structural differences between healthy subjects and patients with schizophrenia and schizoaffective disorder: A graph and control theoretical perspective
Saving Lives with Pre-Financed Rules-Based Disaster Aid: Evidence from Mexico
Emerging and Continuing Trends in Opioid Overdose Decedent Characteristics during COVID-19
Inhaled nitric oxide use in COVID19-induced hypoxemic respiratory failure.