The emergence of Covid-19 has affected all aspects of human life across the globe. Lockdowns everywhere are having dramatic social and economic consequences. No therapy has yet been approved, and vaccines are a priority potential tool to control the pandemic and its impacts. Multiple vaccines are in the last stage of the development process, but part of the population is not willing to get vaccinated for Covid-19. Several studies have examined the percentage of the population willing to get vaccinated, but few have analyzed the reasons for their decision. In this context, researching the factors influencing individuals’ intention to use a potential Covid-19 vaccine will be important to public health strategies. This paper analyzes these factors with an adapted Cognitive-Affective-Normative (CAN) model. Perceived vaccine efficacy is used as a cognitive variable, fear of the vaccine and fear of Covid-19 are used as affective variables, and social influence is used as the normative variable. The proposed model strongly explains the intention to use the Covid-19 vaccine (R2 = 0.81). The results show that vaccine efficacy will be the most important determinant of Covid-19 vaccine acceptance, followed by social influence. The findings can be very helpful for public health policies aimed at achieving widespread vaccination, a must for vaccine success.

Covid-19 的出现影响了全球人类生活的方方面面。各地的封锁都产生了巨大的社会和经济后果。尚未批准任何疗法，疫苗是控制大流行及其影响的优先潜在工具。多种疫苗处于开发过程的最后阶段，但部分人口不愿意接种 Covid-19 疫苗。几项研究调查了愿意接种疫苗的人口百分比，但很少有人分析他们决定的原因。在这种情况下，研究影响个人使用潜在 Covid-19 疫苗的意图的因素对公共卫生战略非常重要。本文使用经过调整的认知-情感-规范 (CAN) 模型分析了这些因素。感知疫苗功效被用作认知变量，对疫苗的恐惧和对 Covid-19 的恐惧被用作情感变量，社会影响被用作规范变量。提议的模型有力地解释了使用 Covid-19 疫苗的意图（R2 = 0.81）。结果表明，疫苗效力将是 Covid-19 疫苗接受度的最重要决定因素，其次是社会影响。这些发现对于旨在实现广泛疫苗接种的公共卫生政策非常有帮助，这是疫苗成功的必要条件。结果表明，疫苗效力将是 Covid-19 疫苗接受度的最重要决定因素，其次是社会影响。这些发现对于旨在实现广泛疫苗接种的公共卫生政策非常有帮助，这是疫苗成功的必要条件。结果表明，疫苗效力将是 Covid-19 疫苗接受度的最重要决定因素，其次是社会影响。这些发现对于旨在实现广泛疫苗接种的公共卫生政策非常有帮助，这是疫苗成功的必要条件。