Instruct: Identify the main category of the given Medrxiv paper based on the title.
Query: Pre-morbid use of proton pump inhibitors has no effect on the risk of death or hospitalization in COVID-19 patients: a matched cohort study
Prospective screening of liver fibrosis in a primary care cohort using systematic calculation of fib-4 in routine results
Modeling aerial transmission of pathogens (including the SARS-CoV-2 virus) through aerosol emissions from e-cigarettes
A Geospatial Analysis of salmonellosis and its with socioeconomic status in Texas
FGF21 defines a potential cardio-hepatic signaling circuit in human heart failure
Risk and mitigation of aerosolisation from lung function testing: results from the AERATOR study.
Quantitative Gradient Echo MRI Identifies Dark Matter as a New Imaging Biomarker of Neurodegeneration that Precedes Tissue Atrophy in Early Alzheimer Disease
Identifying the genetic and non-genetic factors associated with accelerated eye aging by using deep learning to predict age from fundus and optical coherence tomography images
Broad Cross-reactive IgA and IgG Against Human Coronaviruses in Milk Induced by COVID-19 Vaccination and Infection
Human lung tissue resident memory T cells are re-programmed but not eradicated with systemic glucocorticoids after acute cellular rejection
Adding a reaction-restoration type transmission rate dynamic law to the basic SEIR COVID-19 model
P1 variant and amino acid mutations at Spike gene identified using Sanger protocol
Secondary attack rates of COVID-19 in Norwegian families: A nation-wide register-based study
Serial interval and basic reproduction number of SARS-CoV-2 Omicron variant in South Korea
Daily Lactobacillus Probiotic versus Placebo in COVID-19-Exposed Household Contacts (PROTECT-EHC): A Randomized Clinical Trial
Global research priorities for COVID-19 in maternal, reproductive and child health: results of an international survey
High rate of BA.1, BA.1.1 and BA.2 in triple vaccinated
The clinical and prognostic significance of Protein Arginine Deiminase 2 and 4 (PADI2 & PADI4) in colorectal cancer
Saliva-based detection of COVID-19 infection in a real-world setting using reagent-free Raman spectroscopy and machine learning
Linkage to primary care public health facilities for cardiovascular disease prevention: A community-based cohort study from urban slums in India
Personal protective equipment does not sufficiently protect against virus aerosol unless combined with advanced air purification or ventilation techniques
Understanding Definitions and Reporting of Deaths Attributed to COVID-19 in the UK - Evidence from FOI Requests
Vaping preferences of individuals who vaporise dry herb cannabis, cannabis liquids and cannabis concentrates
Perceptions and acceptance of COVID-19 vaccine among pregnant and lactating women in Singapore: A cross-sectional study
Evaluating the Long-Term Efficacy of COVID-19 Vaccines
Theoretical derivation and clinical validation of the resolution limit of human eye to spherical lens change：A Self-controlled Study