Instruct: Identify the main category of medRxiv papers based on the titles.
Query: Clinical efficacy and increased donor strain engraftment after antibiotic pretreatment in a randomized trial of ulcerative colitis patients receiving fecal microbiota transplant
Accumulation of dihydrosphingolipids and neutral lipids is related to steatosis and fibrosis damage in human and animal models of non-alcoholic fatty liver disease
Epidemiological Investigation of New SARS-CoV-2 Variant of Concern 202012/01 in England
Generalized and specific whole-brain white matter abnormalities in human cocaine and heroin use disorders
High COVID-19 vaccine coverage allows for a re-opening of European universities
Investigation of air change rate and aerosol behavior during an outbreak of COVID-19 in a geriatric care facility
Acceptability and associated factors of indoor residual spraying for Malaria control by households in Luangwa district of Zambia: A multilevel analysis
Next-generation Serology by Mass Spectrometry: Readout of the SARS-CoV-2 Antibody Repertoire
Afucosylation of HLA-specific IgG1 as a potential predictor of antibody pathogenicity in kidney transplantation
The local and systemic response to SARS-CoV-2 infection in children and adults
Decreased retinal vascular complexity is an early biomarker of MI supported by a shared genetic control.
A mixture of essential oils from three Cretan Aromatic Plants (thyme, Greek sage and Cretan dittany, CAPeo) inhibits SASR-CoV-2 proliferation: in vitro evidence and a Proof-of-Concept intervention study in mild ambulatory COVID-19-positive patients
qPCR in a suitcase for rapid Plasmodium falciparum and Plasmodium vivax surveillance in Ethiopia
Adverse childhood experiences and trajectories of psychological distress in adulthood: an analysis of the 1958 British birth cohort
Retrospective Assessment of Treatments of Hospitalized Covid-19 Patients
Low risk of SARS-CoV-2 transmission via fomite, even in cold-chain
Comparison of Machine Learning Algorithms for the Prediction of Current Procedural Terminology (CPT) Codes from Pathology Reports
The Missing Link: A Closed Form Solution to the Kermack and McKendrick Model Equations
Bladder Cancer Immunotherapy by BCG is associated with a significantly reduced risk of Alzheimer disease
Does the use of intraoperative CT scan improve outcomes in Orthopaedic surgery? A protocol for systematic review and meta-analysis.
Experience of Adults with Upper-limb Difference and their Views on Sensory Feedback for Prostheses: A Mixed Methods Study
Long-Term Effects of Chronic Hemiparetic Stroke and Botulinum Neurotoxin on Wrist and Finger Passive Mechanical Properties
Massive social protests amid the pandemic in selected  Colombian  cities:  Did  they increase COVID-19 cases?
On the persistence of mental health deterioration during the COVID-19 pandemic by sex and ethnicity in the UK: evidence from Understanding Society
Physical Injuries and Burns among Refugees in Lebanon: Implications for Programs and Policies
When does contacting more people lessen the transmission of infectious diseases?