The association between adverse events of COVID-19 vaccination and anxiety and willingness to receive a booster dose.

Many countries have initiated a booster dose for COVID-19 vaccination. However, little is known about the association between adverse events to vaccination and individual psychological status and willingness to receive the booster dose. From December 1, 2021 to February 1, 2022, 474 participants answered a questionnaire in a university town in China, and information about previous adverse events, anxiety status, and vaccination intention were collected. Chi-square test and logistic regression models were used to analyze the factors associated with willingness to receive booster dose of vaccine. Previous adverse events, such as pain at the injection site, fatigue, muscle pain and headache were associated with anxiety of the participants. About 76.2% of the participants were willing to receive booster dose of vaccine. However, adverse event was not associated with their willingness to receive the booster dose. Participants with age ≤25 were less willing to receive the booster dose, although the association was not statistically significant in the multivariable model. In conclusion, the adverse events of COVID-19 vaccination were associated with psychology status of the vaccinated people. It is still necessary to strengthen the public education on COVID-19 vaccination to improve the vaccination willingness of people, especially among the young people.

[Wavelength intervals selection of LED illumination for color vision application].

In color vision application, for the images with multiple colors, object can not be clearly separated from complicated background. The discrimination of the surfaces can be enhanced by selecting appropriate wavelength intervals of illumination. Firstly, the reflectance functions of all the surfaces were calibrated by four standard references. Then partial least squares method was used for selecting the effective wavelength interval of illumination. The variables important in projection (VIP) scores of wavelength intervals were considered as selection criteria. Wavelength intervals with the VIP > 1.0 were selected for illumination. Finally, three effective wavelength intervals of LED illumination were selected to separate all the surfaces of experiment image simultaneously. For separating all the surfaces of experiment image simultaneously and improving discrimination, the experiment was carried out. The experiment results demonstrate the usefulness of this method.