Instruct: Identify the main category of the given Medrxiv paper based on the title.
Query: Effectiveness of COVID-19 vaccines against SARS-CoV-2 variants of concern: a systematic review and meta-analysis
Cohort-specific serological recognition of SARS-CoV-2 variant RBD antigens
Prediction Models for Severe Manifestations and Mortality due to COVID-19: A Rapid Systematic Review
Social return on investment of home exercise and community referral for people with early dementia
Knowledge barriers in the symptomatic-COVID-19 testing programme in the UK: an observational study
Examining the intersection of child protection and public housing: development, health and justice outcomes using linked administrative data
Migration and Outbreaks of Vaccine-Preventable Disease in Europe: A Systematic Review
National interest may require distributing COVID-19 vaccines to other countries
Prune intake ameliorates chronic constipation symptoms and causes little discomfort from diarrhea and loose stools: A randomized placebo-controlled trial
SARS-CoV-2 Breakthrough Infections among the Healthcare Workers Post-Vaccination with ChAdOx1 nCoV-19 Vaccine in the South Indian State of Kerala.
Modelling the effect of an improved trace and isolate system in the wake of a highly transmissible Covid-19 variant with potential vaccine escape
COVID-19 vaccine willingness and cannabis use histories
SARS-CoV-2 Heterogeneity by Ethnicity in Los Angeles
Socio-demographic factors associated with early antenatal care visits among pregnant women in Malawi: 2004-2016
Computer-assisted analysis of polysomnographic recordings improves inter-scorer associated agreement and scoring times
Follow-up study in the ski-resort Ischgl: Antibody and T cell responses to SARS-CoV-2 persisted for up to 8 months after infection and transmission of virus was low even during the second infection wave in Austria
Frequency of FLCN Loss of Function Variants and Birt-Hogg-Dube-Associated Phenotypes in a Healthcare System Population
Modelling of COVID-19 pandemic vis-a-vis some socioeconomic factors
Polyautoimmunity Clusters as a New Taxonomy of Autoimmune Diseases
Determinants of anti-PD1 response and resistance in clear cell renal cell carcinoma
A row-generation approach for simultaneous multiple needle trajectory planning in radiofrequency ablation
Paternal body mass index before conception associated with offspring's birth weight in Chinese population: a prospective study
Modeling the initial phase of COVID-19 epidemic: The role of age and disease severity in the Basque Country, Spain
Inter-population differences of allele frequency and regulome tagging are associated with the heterogeneity of loci identified by cross-ancestry genome-wide association studies
A Predictive Modelling Framework for COVID-19 Transmission to Inform the Management of Mass Events
AI-DRIVEN QUANTIFICATION OF GROUND GLASS OPACITIES IN LUNGS OF COVID-19 PATIENTS USING 3D COMPUTED TOMOGRAPHY IMAGING