How urban versus rural population relates to COVID-19 booster vaccine hesitancy: A propensity score matching design study.

During the COVID-19 pandemic, the vaccine hesitancy has significantly affected the vaccination. To evaluate the booster vaccine hesitancy and its influencing factors among urban and rural residents, as well as to estimate the net difference of booster vaccine hesitancy between urban and rural residents. We conducted a nationwide, cross-sectional Internet survey on 1-8 February 2023, and employed stratified random sampling technique to select participants (≥18 years old) from urban and rural areas. Multivariate logistic regression was used to determine the factors impacting booster vaccine hesitancy. Propensity Score Matching was used to estimate the net difference of COVID-19 booster vaccine hesitancy between urban and rural residents. The overall COVID-19 booster vaccine hesitancy rate of residents was 28.43%. The COVID-19 booster vaccine hesitancy rate among urban residents was found to be 34.70%, among rural residents was 20.25%. Chronic diseases, infection status, vaccination benefits, and trust in vaccine developers were associated with booster vaccine hesitancy among urban residents. Barriers of vaccination were associated with booster vaccine hesitancy among rural residents. PSM analysis showed that the urban residents have a higher booster vaccine hesitancy rate than rural residents, with a net difference of 6.20%. The vaccine hesitancy rate increased significantly, and the urban residents have a higher COVID-19 booster vaccine hesitancy than rural residents. It becomes crucial to enhance the dissemination of information regarding the advantages of vaccination and foster greater trust among urban residents toward the healthcare system.

Impacts of travel duration on urban-rural resident free vaccination behavior: Chinese COVID-19 vaccine booster dose evidence.

This study aimed to evaluate how the duration of travel affects the behavior of urban and rural residents regarding free COVID-19 vaccination, and provide scientific evidence for promoting free vaccination and building an immune barrier to cope with future epidemics. From August 3, 2022 to February,18,2023, A follow-up survey was conducted in urban and rural adults in four cities in China to collect information on socio-demographic factors, vaccination status and travel time for vaccination. Propensity score matching (PSM) analysis was deployed to measure the net difference of the enhanced vaccination rate between urban and rural residents in different traffic time distribution. A total of 5780 samples were included in the study. The vaccination rate of the booster dose of COVID-19 vaccine among rural residents was higher than that of urban residents with a significant P-value (69.36% VS 64.49%,p < .001). The traffic time had a significant negative impact on the COVID-19 booster vaccination behavior of urban and rural residents. There was a significant interaction between the travel time to the vaccination point and the level of trust in doctors. Travel time had a negative impact on the free vaccination behavior of both urban and rural residents. The government should optimize and expand the number of vaccination sites and enhance residents' trust in the medical system. This is crucial for promoting free vaccination and effective epidemic management in the future.

[Screening of special scFv antibody against human p53 protein by yeast two-hybrid system].

OBJECTIVE: To construct a mouse single-chain fragment variable (scFv) antibody library specific to human P53 by overlapping PCR method and screen the single chain antibodies against human P53 protein with the yeast two-hybrid (Y2H) system. METHODS: The bait vector pGBKT-p53 expressing P53 protein in yeast AH109 cells was constructed by means of genetic engineering method. The total RNA which was extracted from the P53-immunized mouse spleen tissue was used to synthesize the single chain V(H)-linker-V(L) fragment by reverse transcription-PCR and overlapping PCR. And then the V(H)-linker-V(L) fragment constructed on the vector pGADT7 was transformed into the AH109 cells containing the bait vector. The positive clones were screened on the nutrition auxotrophic media. The characteristics of scFv were verified by immunocytochemistry. RESULTS: The bait vector pGBKT7-p53 was constructed successfully and transformed into AH109 cells. It had no self-activation in the yeast cells and no toxicity to the host. The library of V(H)-linker-V(L) was successfully obtained. The captured vector harboring V(H)-linker-V(L) fragments was constructed. We screened out the human P53 scFvs by the Y2H system. And scFv1/2/3 was proved to have a good affinity for human P53 protein, so it could be used for the identification of P53 protein in cells and tissues. CONCLUSION: We obtained human P53 scFvs with a good affinity for human P53 protein by Y2H system, which provided a new way for screening scFv.