Online Public attention and interest in COVID-19 Vaccination in mainland China (Preprint)

Abstract

BACKGROUND In December 2019, few cases of pneumonia were reported outbursting in the city Wuhan, Mainland China and soon became a global pandemic. With the vaccination approval in Mainland China, concerns over its safety and efficacy emerged. Since the Chinese Vaccine has been promoted by the Chinese government for months, and just got emergency approval from the World Health Organization. The Chinese vaccination program is yet to be identified from the perspective of local populations. OBJECTIVE To examine the perception, complaints, and inquiries related to the current vaccination program to identify public concerns or hesitancy with the leading search engine in Mainland China. METHODS The COVID-19 Vaccine related keywords were examined and queried on Baidu Index for the period 2019.01–2021.04. The searching popularity of each keyword was recorded to analyze the search trend and demographic distributions. Data of demand graph and trend data used for users' demand analysis. Daily Vaccination data were retrieved from the daily government report since 2021,03. RESULTS Seventeen vaccination keywords were retrieved and with a total BSI value of 13,708,853. The first vaccine enquiry emerged on 25th January 2020, and the searching trend APC is 21.05% (p < .05). With reference to the government announcement, the coefficient of correlation (r) values is 0.38 (p < .05). As to the age distribution, 39.22% of the search were from people aged 20-29 years and dominated the vaccine enquiry. Followed are the 33.00% from aged 30-39 yr, 14.34% from aged 40-49 yr, 9.27% from aged under 19 yr and 3.88% from aged over 50 yr. In the user demand section, the total valid BSI of the vaccine demand terms were 3,843,325,561. Over 54.93% of the demand term search were pandemic relevant, and the summed vaccine demand ratio was 44.79%. CONCLUSIONS The rising search population in COVID-19 Vaccination revealed elevating public interest and focus. Vaccine education programs and materials should be designed for teens and people aged above the 40s. Complaints and symptoms describing inquiries were low, but vaccine-related birth safety should be alerted and further investigated. CLINICALTRIAL Not applicable

A novel temperature calculation method of canned permanent magnet synchronous motor for vacuum pump

“…The heat transfer coefficient of the housing surface can be calculated according to the following Eq. ( 7) [23].…”

“…where: γ is the heat transfer coefficient of the housing surface, ω 1 is the wind speed on the inner wall of the housing, and θ is the outer surface temperature of the housing. Equation ( 8) can be used for calculating the heat transfer coefficient for water cooling mode [23,24].…”