Results indicated that the sample population was divided between vaccine acceptance and refusal whenever available. This finding highlights the dilemma of the topic in the Saudi population, where half of the population will accept vaccination. Moreover, the study revealed several key predictors of hesitancy toward COVID-19 vaccination. Older females with high levels of education, no history of influenza vaccine uptake, and negative beliefs toward vaccination were more likely to display hesitation toward COVID-19 vaccination. Notably, being part of a high risk group did not improve the odds of being vaccinated. The most significant predictor of vaccination is holding positive beliefs.
Although studies that assessed hesitancy toward COVID-19 vaccination are limited, the acceptance/ hesitancy rates toward any vaccine are diverse across the world [10]. Correspondingly, the percentage of hesitancy toward COVID-19 vaccination in the present study was twice that of the percentage reported for China [8], the USA [13], and Egypt [14]. This result emphasized the fact that further efforts are required in Saudi Arabia to increase the future uptake of COVID-19 vaccination perhaps by improving beliefs over eventual COVID-19 vaccination in particular and vaccination in general.
The most significant predictor for acceptance of COVID-19 vaccination was beliefs. This result is congruent with that of a previous systematic review conducted by Bish et al.[15] to assess the evidence for factors associated with H1N1 vaccine acceptance. The authors reported that participants’ beliefs toward H1N1 vaccination was strongly associated with the intention to be vaccinated in studies carried out in Turkey, Australia, the United Kingdom, and Malaysia.
Results demonstrated that self-reported influenza vaccine uptake was a positive predictor for the acceptance of eventual COVID-19 vaccination. Similarly, previous studies have shown that the rate of H1N1 vaccine acceptance was higher among participants with a history of uptake of the seasonal influenza vaccine in the USA [16] and France [17]. Of concern, however, the self-reported rate of influenza vaccine is very low across regions in Saudi Arabia. A study carried out in the Western region of Saudi Arabia indicated that only 18.5% of people received the influenza vaccine in 2015 [18]. The same rate was reported in the Central region of Saudi Arabia in 2011 [19]. Given that COVID-19 is highly contagious with high mortality rates, a significant portion of the population should be vaccinated for the prevention of the disease. However, given the correlation between previous influenza vaccine use and likelihood of accepting COVID-19 vaccination, the current study argued that the Saudi population may experience low rates of vaccination whenever COVID-19 vaccination becomes available.
Male gender was another positive predictor for acceptance of COVID-19 vaccination. This result could be due to the reported high rates of COVID-19-related morbidity and motility among male infected patients [20]. Furthermore, women tend to support conspiracy theories at a higher proportion than men [21], which may be one of the factors that can explain women’s higher resistance to vaccination.
Another positive predictor for the acceptance of COVID-19 vaccination was age. Younger participants tended to be more accepting of vaccination in contrast with older participants. The same trend was observed among participants with secondary and university levels of education compared to participants with higher education. A possible explanation is that younger participants are more frustrated with social restrictions and curfews associated with the COVID-19 crisis and would thus be more willing to be vaccinated. At the same time, younger people may be more accustomed and trusting of science and technology in contrast with their older counterparts. At the same time, school suspension may negatively affect the academic performance of school-aged and university participants. Therefore, they are more impatient to bring an end to the situation and thus more accepting of vaccination. Further studies should explore these possibilities as these data can be useful for future vaccination campaigns.
Although a previous study indicated that the majority of Chinese healthcare workers were willing to accept COVID-19 vaccination [8], more than half of Saudi healthcare workers displayed hesitancy toward vaccination. However, hesitancy toward influenza vaccination has been previously reported among Irish [22] and Saudi [23] healthcare workers. At the other end of the spectrum, Dempsey et al.[24] underlined the positive influence of healthcare professionals on increasing the uptake of human papillomavirus vaccination among adolescents in a randomized clinical trial. Given these aspects, the finding of the present study regarding the hesitancy of healthcare workers in Saudi Arabia toward COVID-19 vaccination is concerning for the following reasons. First, healthcare workers are at high risk of COVID-19 infection and thus of spreading the disease. Secondly, healthcare workers play a central role in convincing people to be vaccinated. This role will most likely be pivotal in increasing the uptake of COVID-19 vaccination. This tendency indicates that future research should focus on assessing the scale of reluctance toward vaccination among Saudi healthcare workers and on developing and testing interventions that may improve vaccination uptake rates and beliefs among healthcare workers in Saudi Arabia.
As stated by MacDonald [25], factors influencing hesitancy toward vaccination could be related to confidence, complacency, and/or convenience. In the present study, lack of confidence in the safety and effectiveness of vaccination were the main barriers preventing the acceptance of COVID-19 vaccination among the population. The speedy pattern of the development of the prospective COVID-19 vaccines could be one of the reasons behind the lack confidence in vaccination, which is similar to reports on the H1N1 pandemic [26].
Another barrier to COVID-19 vaccination was the COVID-19 conspiracy theory, which has spread very rapidly around the world [9, 27, 28] via social media platforms, precisely where the study participants were recruited. This scenario may indicate that future studies should use a different sampling population via purposive sampling by first testing the susceptibility potential participants to believe in conspiracy theories.
The widespread conspiracy theory could be due to the people’s psychological need to understand the unexpected events associated with the COVID-19 pandemic [29]. Moreover, the conspiracy theory has been reported as a reason as a factor for hesitancy toward vaccination, such as that during the H1N1 pandemic [30] and influenza vaccine among the Saudi population [23].
In agreement with previous research in China [8], the majority of vaccine refusers stated that they require additional research to confirm the safety and effectiveness of vaccination before acceptance. This finding could be explained partially by the fact that majority of the participants in the current study were at the university level. Moreover, the majority of vaccine refusers achieved higher levels of education. Consequently, their background knowledge may contribute to their judgment on the vaccination concept.
Notably, during the H1N1 influenza A pandemic, the public acceptance rate of Americans toward vaccination before its approval was 8.7% [31]. However, the rate of self-reported vaccination uptake increased to 20% after a vaccine was introduced to the market [32].
Given that vaccination is the cornerstone of reduced healthcare burden caused by the COVID-19 pandemic, the results of the study can be utilized for planning evidence-based vaccination campaigns while waiting for vaccine development [33]. By enhancing people's beliefs over vaccination and by understanding the barriers to acceptance of COVID-19 vaccination will most likely enhance people’s acceptance, which may result in a maximized vaccine uptake when it becomes available.
The current study has certain limitations. The study was conducted using an online self-administered questionnaire instead of face-to-face interviews due to the implemented curfew and social distancing restrictions during the COVID-19 pandemic. As a result, reporting bias should be considered. Moreover, the cross-sectional study represents public acceptance and beliefs toward COVID-19 vaccination during the pandemic before the availability of a vaccine. With this notion, people’s acceptance and beliefs could be changed with time as reported in other studies on pandemics [16].
Furthermore, disparities were noted across regions with regard to response rate. The highest response rate was noted for the Western region, which is one of the largest in the country. The Makkah, AlMadinah, and Jeddah cities can be found in this region, which are the most affected cities by COVID-19 in Saudi Arabia. This scenario could make people from the region more aware and anxious about topics related to COVID-19. Other factors may have contributed, such as availability of the Internet as well as differences in perception toward the use of social media platforms across regions.