IMU-201

Context: Conventional wisdom suggests that people with a collectivist tradition tend to comply more with the government's regulatory and even coercive disease-prevention policies. Besides this socio-cultural element, political partisanship is also an important aspect relating to people's willingness to cooperate with the government. This study aims to examine the relationships between these two factors and three dimensions of vaccination policy attitudes: common responsibility to take the vaccine, the government's vaccine mandate, and indignation over anti-vaxxers.Methods: Using the data from a nationally representative cross-sectional survey conducted in 2022 in Taiwan, this study applies multiple linear OLS regression to examine the relationships between vaccination policy attitudes and Confucian collectivism and political partisanship.Findings: Confucian collectivism and political partisanship aligning with the ruling party are associated with supportive vaccination policy attitudes. For those who do not align with the ruling party, the negative attitudes toward the vaccination policy appear in different dimensions according to the party they lean to.Conclusions: Confucian collectivism is prevalent in Taiwan and is related to public attitudes toward vaccination policy. This association is independent of political partisanship. Public health authorities should consider the socio-cultural context and political atmosphere for the effectiveness of disease-prevention measures.

An effective vaccine for combination antiretroviral therapy (cART)-free virologic control of HIV-1 by enhancing antigen-specific effector-memory CD8 + T lymphocytes could be useful in controlling the AIDS pandemic. Previously, we demonstrated that a programmed death-1 (PD-1)-based DNA vaccine, pRhPD1-p27, was effective in inducing Gag-p27-specific effector-memory CD8 + T cells for viremia suppression in rhesus macaques infected with pathogenic SHIV SF162P3CN for 2 years. In this follow-up study, we report on two pRhPD1-p27-vaccinated and SHIV SF162P3CN -infected macaques that have remained alive to date with undetectable viremia levels and low proviral loads over 6 years in the absence of cART, achieving a state of sustained virologic control. Polyfunctional effector-memory Gag-p27-specific T cells were maintained in these macaques. Moreover, several T cell epitopes found at 6 years post-viral challenge were identical to those induced during the vaccination phase, indicating sustained vaccine-induced memory T cell responses. The viral challenge resulted in de novo Nef-specific T cell responses, which were also maintained. These Gag-p27- and Nef-specific T cell responses were stronger than those in some SHIV SF162P3CN -infected macaques that showed viremia control after experimental therapy using a tandem bispecific neutralizing antibody. Our findings indicate that the PD-1-based DNA vaccine strategy holds promise as a clinical immunotherapy for long-term HIV-1 suppression.

Efficient strategies for HIV-1 cART-free virologic control are critical for ending the AIDS pandemic. The essential role of effector-memory CD8 + T cells in controlling viremia and eliminating virus-infected cells has made them a promising target for vaccine development. It has been previously reported that PD-1-based DNA vaccination was effective in inducing polyfunctional effector-memory CD8 + T cells for AIDS virus control for 2 years in rhesus monkeys. This follow-up study extends the findings and shows that a viremia-free period of over 6 years was detected in two monkeys immunized with PD-1-based DNA vaccine against pathogenic SHIV SF162P3CN infection in the absence of antiretroviral therapy. Long-term vaccine-induced memory T cell responses were detected. Our results warrant the clinical trials of PD-1-based DNA vaccines for achieving HIV-1 cART-free virologic control used either alone or in combination with other biomedical interventions.