China has one of the world’s largest populations using alcohol. With the trend of increasing alcohol consumption and the rapid growth of its aging population, China has faced imminent public health challenges in the past few decades. This research study aims to investigate determinants related to alcohol consumption behaviors or alcohol dependence among older adults (age ≥60) in China. Using the Chinese Longitudinal Healthy Longevity Survey from 2000 to 2014 waves (n = 35,377), we estimated multivariable logistic regression models to examine the factors associated with current alcohol consumption status, alcohol consumption experience, daily consumption, and alcohol dependence. Of all respondents between 2000 and 2014, 5.7% were current alcohol users, 20.3% reported alcohol use experience, 3.3% used alcohol daily, and approximately 1.1% reported alcohol dependence. Current smoking status, health status, and respondents’ gender were associated with all alcohol-related behaviors (p < .05). In addition, older adults from newer waves had higher odds of becoming daily alcohol consumers and having alcohol dependence, compared with older adults in the 2000 wave. Older adults living in an institution had lower odds of becoming current alcohol users, compared with those living with household members. Older adults residing in eastern regions had higher odds of becoming current alcohol users, compared with northern residents. Rural residents had higher odds of reporting alcohol use patterns (p < .01), except alcohol use experience. Future public health interventions and promotional strategies should focus on regional and community disparities in China.

China has undergone rapid social transitions within the last few decades. However, mental health issues, challenges to psychological well-being, and poor dietary choices have gradually surfaced. These health concerns are related to the rapid growth of the aging population and of the fast-paced industrialized society. Nevertheless, there is little knowledge about food preferences and psychological well-being measurements in contemporary China. Applying the 2011 China Health and Nutrition Survey (CHNS) with a cross-sectional study design (n = 7970), we conducted multinomial logistic regression models to investigate the associations of food preferences, including fast food, salty snacks, fruits, vegetables, and sweetened beverages, with psychological well-being among Chinese middle-aged and older adults (age ≥ 45). Food preferences are mostly associated with psychological well-being (p < 0.05). However, respondents’ preferences regarding fast food, salty snacks, and sweetened beverages are associated not only with poorer psychological health status, but also with positive psychological well-being. We speculate that Chinese older adults may consume Westernized fast food and salty snacks as pleasure to the palate due to the recent Westernization in modern China. We also provide practical implications of results from this preliminary study.

Infectious diseases remain a substantial public health concern as they are among the leading causes of death. Immunization by vaccination can reduce the infectious diseases-related risk of suffering and death. Many countries have developed COVID-19 vaccines in the past two years to control the COVID-19 pandemic. Due to an urgent need for COVID-19 vaccines, the vaccine administration of COVID-19 is in the mode of emergency use authorization to facilitate the availability and use of vaccines. Therefore, the vaccine development time is extraordinarily short, but administering two doses is generally recommended within a specific time to achieve sufficient protection. However, it may be essential to identify an appropriate interval between two vaccinations. We constructed a stochastic multi-strain SIR model for a two-dose vaccine administration to address this issue. We introduced randomness into this model mainly through the transmission rate parameters. We discussed the uniqueness of the positive solution to the model and presented the conditions for the extinction and persistence of disease. In addition, we explored the optimal cost to improve the epidemic based on two cost functions. The numerical simulations showed that the administration rate of both vaccine doses had a significant effect on disease transmission.