Political attitudes and efficacy of health expert communication on the support for COVID-19 vaccination program: Findings from a survey in Hong Kong.

Despite evidence suggesting that vaccines offer protection against COVID-19, the uptake rates of COVID-19 vaccines have been low in some high-income regions. Support for vaccination program is important to fight the pandemic. This study aimed at exploring two research questions: first, to what extent political attitudes are associated with support for COVID-19 vaccination program; and second, whether health expert communication is effective in increasing the support. An online survey was undertaken by 1079 Hong Kong residents aged 18-77 years from May 26 to June 3, 2021. The survey found higher support in pro-government respondents, and lower support in political opposition. A strategy of positive communication by health experts could increase support in the opposition and politically attentive respondents. Other variables that were positively related to program support were quarantine experience, trust in government, preference for pandemic control over freedom, political attentiveness, and disagreement with China's influence on Hong Kong's COVID-19 policymaking. This study contributes to understanding the relationship between political attitudes and support for vaccination program and provides empirical evidence of the efficacy of health expert communication strategy in improving support for vaccination program for people with certain political attitudes.