Instruct: Identify the main category of the given Medrxiv paper based on its title.
Query: The impact on the mental health and well-being of unpaid carers affected by social distancing, self-isolation and shielding during the COVID 19 pandemic in England - a systematic review
SARS-CoV-2 RNA in urban wastewater samples to monitor the COVID-19 epidemic in Lombardy, Italy (March - June 2020)
Expert Surgeons and Deep Learning Models Can Predict the Outcome of Surgical Hemorrhage from One Minute of Video
Modeling robust COVID-19 intensive care unit occupancy thresholds for imposing mitigation to prevent exceeding capacities
Medical students' perception of live lectures compared to video lectures in basic sciences medical education: a cross-sectional survey of medical colleges in Pakistan
PCR test positive rate revealing the real infection epidemic status examined in the COVID-19 epidemic in Tokyo, Japan
The Impact of Non-Pharmaceutical Interventions on the First COVID-19 Epidemic Wave in South Africa
Genetic insights into the biological mechanisms governing human ovarian ageing
The UK Coronavirus Job Retention Scheme and changes in diet, physical activity and sleep during the COVID-19 pandemic: Evidence from eight longitudinal studies
Machine Learning Applied to Routine Blood Tests and Clinical Metadata to Identify and Classify Heart failure
The Kinetics of COVID-19 Vaccine Response in a Community Vaccinated Population
Mutations on non-structural proteins of SARS-CoV-2 are possibly responsible for adverse clinical outcomes in a real-life practice
Dental care of patients with dementia: A survey on practice equipment, training, and dental treatment
Injection Drug use Practices and HIV infection among People Who Inject Drugs in Kigali, Rwanda.
A randomized clinical trial of a booster dose with low versus standard dose of AZD1222 in adult after 2 doses of inactivated vaccines
Inequities among vulnerable communities during the COVID-19 vaccine rollout
Assessing physical and environmental predictors of bovine Schistosoma japonicum infection in rural China
Socioeconomic Disparities in the Effects of Pollution on Spread of Covid-19: Evidence from US Counties
Risk factors and impacts of child growth faltering in low- and middle-income countries
Germline predisposition to pediatric Ewing sarcoma is uniquely characterized by inherited pathogenic variants in DNA damage repair genes
Evidence of widespread endemic populations of highly multidrug-resistant  Klebsiella pneumoniae  seen concurrently through the lens of two hospital intensive care units in Vietnam
Humoral responses following SARS-CoV-2 breakthrough infection in COVID-19 vaccinated individuals
Prescription opioid-related alterations to amygdalar and thalamic functional networks in chronic knee pain: A retrospective case control resting-state connectivity study.
Effect of biannual azithromycin distribution on antibody responses to malaria, bacterial, and protozoan pathogens among children: A cluster-randomized, placebo-controlled trial in Niger
Exposure contrasts of pregnant women during the Household Air Pollution Intervention Network randomized controlled trial
A USABILITY EVALUATION OF PORTABLE BREATH KETONE SENSOR DEVICES BY AND FOR YOUNG PEOPLE WITH TYPE 1 DIABETES MELLITUS