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Kikuchi‐Fujimoto Disease (KFD), also known as Kikuchi disease or Kikuchi histiocytic necrotizing lymphadenitis, is a rare and self‐limiting condition characterized by cervical lymphadenopathy and fever, primarily affecting young Asian adults. The aetiology of KFD remains unknown, although various infectious agents have been suggested as potential triggers. With the emergence of the COVID‐19 pandemic, cases of post‐COVID‐19 KFD and post‐COVID‐19 vaccine KFD have been reported. In this article, we present the first case of post‐COVID‐19 KFD in Hong Kong. A 24‐year‐old man developed fever and painful neck swelling 1 month after recovering from COVID‐19. Diagnostic evaluation, including ultrasound‐guided fine needle aspiration cytology (FNAC), confirmed the diagnosis of KFD. The patient's symptoms resolved spontaneously with supportive care. This case underscores the importance of considering KFD as a potential differential diagnosis in patients presenting with cervical lymphadenopathy and fever following COVID‐19 recovery or vaccination. [ABSTRACT FROM AUTHOR]

Through the actions and interactions of video platform users, talent shows have expanded from the entertainment sphere to the social sphere and become an everyday part of life. Watching talent shows on online platforms, especially through participation in multi-platform interaction, is an ever developing and innovative field in many regions. This study adopts a multiple case analysis approach. We analyze and compare three cases of talent shows, examining aspects of their value co-creation, digital platform, dynamic capability and value network through an exploration of a series of creative activities on digital video platforms. Talent shows provide a unique environment in which different actors interact, co-exist and co-create value, i.e., another form of O2O marketing. These actors include producers, entertainment companies, sponsors and fans, and fan value co-creation currently takes many different forms, which are experienced, engaged and interacted with through different platforms. The findings contribute to examining the underlying dynamics of TV talent shows, in addition to explaining how they are achieving sustainable advantages in the media market. Furthermore, this study aims to understand the service ecosystem of network talent shows from the perspective of industrial innovation strategy; consequently, this research can help to promote the implications of this new form of digital content services and its innovation strategies. [ABSTRACT FROM AUTHOR]

The air infiltration rate in a high-rise residential building can influence indoor air quality and building energy consumption. This study was carried out to estimate the air infiltration rates of all the residential units in Cheung Sha Wan Estate, a public housing estate in Hong Kong. Computational fluid dynamic (CFD) simulations were conducted for the neighborhood to obtain the wind pressures on the building envelopes through the use of annual weather data from the Hong Kong Observatory. Various cases with different wind speeds and directions were conducted to cover the majority of the possible scenarios. The resulting wind pressures were used as input data in the multizone airflow network model to calculate the infiltration rates of all the residential units. On-site measurements of infiltration rate were carried out in four residential units in Cheung Sha Wan Estate for estimation of the effective leakage areas for the multizone airflow calculations. Based on the calculated results and the probability of occurrence for each scenario, statistical measures of the estimated air infiltration rates were determined. The results show that the mean annual-average infiltration rate among the 596 residential units of Cheung Tai House was 0.26 h−1 with a standard deviation of 0.11 h−1. Furthermore, the infiltration rate was positively associated with the wind speed, negatively associated with the volume of the residential unit, and insensitive to the floor level. When the arrangement of the surrounding buildings provided a clear path for the wind, the infiltration rate was higher. • Air infiltration rates of all residential units in a public housing were estimated. • On-site measurements were carried out to estimate effective leakage areas. • Mean annual-average infiltration rate among the 596 residential units was 0.26 h−1. [ABSTRACT FROM AUTHOR]

In this warming world, radiative cooling is believed to be one of the most promising techniques for keeping cool without increasing greenhouse gas emissions. Glass bubbles have been proposed as a component of high-performance radiative cooling paints because of the bubbles' controllable size and their enhancement of light scattering. However, the current radiative cooling paints with glass bubbles suffer from low solar reflectivity because of their large particle size. In this study, we propose the idea of breaking the glass bubbles by means of ball milling to enhance the cooling performance of radiative cooling paints. The ball-milling process increases the solar reflectivity from 93.3% to 97.3% with the thermal emissivity of ∼93.4%, while the temperature difference with the ambient air is increased from 1.8 °C to 3.5 °C at noon. When the paint is covered with nanoporous polyethylene film, the temperature is 8.5 °C below the ambient air temperature at noon and 14.1 °C at night. The superior radiative cooling capability of the paint and the record-setting temperature difference achieved in Hong Kong demonstrate its excellent cooling performance, while the simple preparation method and ease of application make this paint promising for commercialization and large-scale production. [Display omitted] • The ball milling process could increase the solar reflectivity from 93.3% to 97.3%. • The temperature difference was increased from 1.8 °C to 3.5 °C at noon. • Record-setting temperature reduction in Hong Kong was achieved. [ABSTRACT FROM AUTHOR]

Although airborne transmission has been considered as a possible route for the spread of SARS-CoV-2, the role that aerosols play in SARS-CoV-2 transmission is still controversial. This study evaluated the airborne transmission of SARS-CoV-2 in COVID-19 isolation wards at Prince of Wales Hospital in Hong Kong by both on-site sampling and numerical analysis. A total of 838 air samples and 1176 surface samples were collected, and SARS-CoV-2 RNA was detected using the RT-PCR method. Testing revealed that 2.3% of the air samples and 9.3% of the surface samples were positive, indicating that the isolation wards were contaminated with the virus. The dispersion and deposition of exhaled particles in the wards were calculated by computational fluid dynamics (CFD) simulations. The calculated accumulated number of particles collected at the air sampling points was closely correlated with the SARS-CoV-2 positive rates from the field sampling, which confirmed the possibility of airborne transmission. Furthermore, three potential intervention strategies, i.e., the use of curtains, ceiling-mounted air cleaners, and periodic ventilation, were numerically investigated to explore effective control measures in isolation wards. According to the results, the use of ceiling-mounted air cleaners is effective in reducing the airborne transmission of SARS-CoV-2 in such wards. [Display omitted] • SARS-CoV-2 was detected in both air and surface samples in isolation wards. • The dispersion and deposition of exhaled particles were analyzed by CFD simulation. • Sampling and simulation supported the possibility of airborne transmission. • Use of ceiling-mounted air cleaners is an effective intervention strategy in wards. • Curtains separate adjacent patients but increase the risk of opposite patients. [ABSTRACT FROM AUTHOR]