As vaccination campaigns of all kinds are rolled out, understanding how people behave when receiving a vaccine becomes increasingly important. The Health Belief Model (HBM) is a social psychology model specifically designed to explain and predict health-related behaviors. Central to this model is how people perceive health issues, the benefits of expected actions, the barriers they face, and their beliefs about their self-efficacy.
The health belief model attempts to explore how people's health beliefs influence whether they take actions to improve their health, including getting vaccinated.
The health belief model was developed in the 1950s by social psychologists at the U.S. Public Health Service. Researchers at the time were concerned about the low rates of tuberculosis screening among the population and began to explore the association with health-related behaviors. This model is not only applicable to vaccination, but can also be applied to predict other health behaviors, such as disease screening and lifestyle changes.
The health belief model consists of several key components that interact with each other to influence an individual's health behavior:
Perceived susceptibility refers to an individual's subjective assessment of his or her risk of developing a health problem. Research shows that people who feel they are at risk are more likely to take actions to reduce that risk. Acceptance of vaccines also often depends on individuals' perception of susceptibility to infection.
Perceived severity reflects an individual's subjective assessment of the severity of a health problem. If people believe that a disease can lead to serious consequences, they are more likely to get vaccinated to avoid those consequences. For example, in studies on influenza vaccines, the more severe people perceived the flu to be, the stronger their willingness to get vaccinated.
In vaccination behavior, perceived severity combines with perceived susceptibility to form "perceived threat," which directly affects willingness to vaccinate.
Perceived benefit refers to an individual's assessment of the benefits that can be obtained from engaging in a health behavior (such as vaccination). If people believe that vaccination is effective in reducing the likelihood of getting a disease, they are more likely to choose to get vaccinated.
Even if there is sufficient awareness of the health risks, if individuals perceive barriers to vaccination (such as inconvenience, cost, fear, etc.), then these barriers will become obstacles to behavior change. Therefore, overcoming these obstacles is key to increasing vaccination rates.
The trade-off between obstacles and benefits often determines whether an individual takes action.
Self-efficacy refers to an individual's confidence in his or her ability to successfully perform a certain behavior. Research shows that self-efficacy also plays an important role in maintaining healthy behaviors. If individuals believe they can overcome difficulties during the vaccination process, their willingness to be vaccinated will naturally increase.
Today's vaccination campaigns can effectively utilize the construct of the health belief model. For example, analyzing the perceived susceptibility and perceived severity of the target group to customize the corresponding education plan. The content can include epidemiological data, potential benefits of vaccination, support and encouragement during the vaccination process, etc., all of which can enhance the public's acceptance of vaccines.
As people gain a deeper understanding of health behaviors, the health belief model may be further adjusted to adapt to the changing social and health environment. In the future, more psychological theories may be integrated into the study of new vaccination behaviors to gain a more comprehensive understanding of the factors that influence vaccination willingness.
However, this makes us think, in addition to the recognized belief model, are there other factors that influence people's health behaviors and willingness to vaccinate?