Informing evidence-based policy during the COVID-19 pandemic and recovery period: learning from a national evidence centre.

Background: The COVID-19 pandemic demonstrated the vital need for research to inform policy decision-making and save lives. The Wales COVID-19 Evidence Centre (WCEC) was established in March 2021 and funded for two years, to make evidence about the impact of the pandemic and ongoing research priorities for Wales available and actionable to policy decision-makers, service leads and the public.

Objectives: We describe the approaches we developed and our experiences, challenges and future vision.

Analysis of heavy metals and pathogen levels in vegetables cultivated using selected water bodies in urban areas of the Greater Accra Metropolis of Ghana.

Open-surfaced water sources have been used to irrigate vegetable farms in cities. Open-surface water often contains unmonitored concentrations of health-threatening contaminants that pose health risks, especially when used to produce vegetables for human consumption. However, information on levels of heavy metals and faecal coliform bacteria in such vegetables in selected sites, especially in Greater Accra Metropolitan Area (GAMA) of Ghana is rare.

Social capital and changes of psychologic distress during early stage of COVID-19 in New orleans.

Here we report on the relationship between measures of social capital, and their association with changes in self-reported measures of psychological distress during the early period of the COVID-19 pandemic. We analyze data from an existing cluster randomized control trial (the Healthy Neighborhoods Project) with 244 participants from New Orleans, Louisiana. Changes in self-reported scores between baseline (January 2019-March 2020) and participant's second survey (March 20, 2020, and onwards) are calculated.

Design and Characterization of Compact, Programmable, Multistranded Nonimmunostimulatory Nucleic Acid Nanoparticles Suitable for Biomedical Applications.

We report a thorough investigation of the role of single-stranded thymidine (ssT) linkers in the stability and flexibility of minimal, multistranded DNA nanostructures. We systematically explore the impact of varying the number of ssTs in three-way junction motifs (3WJs) on their formation and properties. Through various UV melting experiments and molecular dynamics simulations, we demonstrate that while the number of ssTs minimally affects thermodynamic stability, the increasing ssT regions significantly enhance the structural flexibility of 3WJs.