Decline in older adults' daily mobility during the COVID-19 pandemic: the role of individual and built environment factors.

BACKGROUND: Extensive research has shown that the COVID-19 pandemic dramatically impacted the daily mobility of older adults. However, very little attention has been paid to the role of individual and built environmental factors in decline in older adults' daily mobility during the pandemic. METHODS: Based on a cohort survey of 741 older adults in Hong Kong, we conducted a one-way ANOVA to explore the differences in determinants (individual or environmental factors) of older adults' daily mobility between before and during the COVID-19 pandemic. Further, multilevel linear regression was performed to examine how individual characteristics and built environment factors are associated with changes in older adults' daily mobility during the pandemic. RESULTS: Results show that the duration of active travel declined from 174.72 to 76.92 min per week, and that the public transport use frequency decreased from an average of 6.14 to 3.96 trips per week during the COVID-19 pandemic (before the rollout of vaccination programme). We also found residential density (p < 0.05) and the number of bus stop was negatively associated with the decline in their active travel (p < 0.01), while a higher destination mix was associated with more significant decrease in active travel (p < 0.01). A higher availability of recreational facilities in neighbourhoods was associated with a greater decrease in public transport use (p < 0.05). In addition, those who were older or having depressive symptoms, which are considered a vulnerable group, were negatively associated with decrease in their mobility (p < 0.001). CONCLUSIONS: Maintaining mobility and social interactions are crucial for older adults' health during the COVID-19 pandemic. This study found that individual and environmental factors differentially affected older adults' active travel and public transport use during the pandemic. Our findings contribute to understanding the COVID-19 impact on daily mobility in older adults and support more effective active travel promotion policies in the post-pandemic future.

Connected Play in Virtual Worlds: Communication and Control Mechanisms in Virtual Worlds for Children and Adolescents

Technology plays an essential role in shaping youth’s communication and social interactions in online multiplayer games. Due to physical distancing restrictions during the COVID-19 global pandemic, online multiplayer games like Minecraft and Roblox are well-positioned to amplify healthy communication/social connections and mitigate the impact of social isolation. Research so far has been focused on how these gaming environments support youth development from the perspectives of individual stakeholders (e.g., caregivers, educators, designers, and developers). However, features of these games, such as communication and parental controls, are often misaligned with the ways in which children develop communication and social skills. Using a series of case studies of popular virtual worlds and online games, this paper provides an analysis of critical design features that serve youth throughout different stages of childhood and early adolescence. We offer three main contributions: (a) a comparison matrix of similarities and differences in communication and control features between platforms;(b) an evaluation of design features in selected virtual world platforms that promote safe and positive social interactions;and (c) a method for cross-platform comparison aimed at helping researchers, designers, and practitioners examine specific dimensions of social communication and play experience in virtual worlds.

Environmental surveillance of SARS-CoV-2 RNA in wastewater systems and related environments in Wuhan: April to May of 2020.

Wastewater-based epidemiology (WBE) has emerged as an effective environmental surveillance tool in monitoring fecal-oral pathogen infections within a community. Congruently, SARS-CoV-2, the etiologic agent of COVID-19, has been demonstrated to infect the gastrointestinal tissues, and be shed in feces. In the present study, SARS-CoV-2 RNA was concentrated from wastewater, sludge, surface water, ground water, sediment, and soil samples of municipal and hospital wastewater systems and related environments in Wuhan during the COVID-19 middle and low risk periods, and the viral RNA copies quantified using reverse transcription quantitative polymerase chain reaction (RT-qPCR). From the findings of this study, during the middle risk period, one influent sample and three secondary effluents collected from waste water treatment plant 2, as well as two samples from Jinyintan Hospital wastewater system influent were SARS-CoV-2 RNA positive. One sludge sample collected from Guanggu Branch of Tongji Hospital, which was obtained during the low risk period, was also positive for SARS-CoV-2 RNA. These study findings demonstrate the significance of WBE in continuous surveillance of SARS-CoV-2 at the community level, even when the COVID-19 prevalence is low. Overall, this study can be used as an important reference for contingency management of wastewater treatment plants and COVID-19 prevention and control departments of Wuhan.

Metro and elderly health in Hong Kong: protocol for a natural experiment study in a high-density city.

INTRODUCTION: Public transport accessible to older people may offer a transformative solution to achieving healthy ageing. However, the evidence to support such transport infrastructure modifications is unclear. Previous studies on public transport use and elderly health were mostly observational studies using cross-sectional data. Few studies have examined the before-and-after effects of a new metro, for example, to see if it leads to improved elderly health. METHODS AND ANALYSIS: We use a new metro line in Hong Kong as a natural experiment to examine the impact of the metro-led public transport intervention on elderly health. In Hong Kong, more than 90% of daily travels are made by public transport. The public transport modifications consist of the new metro line with eight stations and changes in the walking environment and bus services around the stations. We will look at the before-and-after differences in public transport use and health outcomes between elderly participants living in treatment neighbourhoods (400 m walking buffered areas of the new metro stations) and in control groups (living in comparable areas but unaffected by the new metro). Questionnaire-based baseline data were collected in 2019 before the COVID-19 pandemic, while some qualitative interviews are ongoing. Amid the pandemic, we conducted a quick telephone-based survey of COVID-19's potential impact on public transport use behaviours of our elderly cohort in September 2020. Note there is no lockdown in Hong Kong until the writing of the paper (January 2021). After the new metro opens, we will conduct a follow-up survey, tentatively in late 2022. We aim to investigate if the new metro and the associated changes in the built environment have any effects on public transport use behaviours, physical activity and wider health outcomes among the elderly (eg, social inclusion, quality of life, subjective well-being). ETHICS AND DISSEMINATION: The Human Research Ethics Committee of the University of Hong Kong reviewed and approved the study procedures and materials (reference number: EA1710040). Results will be communicated through scientific papers and research reports.