VACCINE HESITATION

Vaccination, which is one of the basic elements of preventive health services, is the most effective, safe and cost-effective health practice in protecting human health and preventing infectious diseases. Vaccination has been recognized as the most effective method for people to cope with infectious diseases. Vaccines protect infants and children against many diseases. Every year, 1 million 700 thousand people die in the world due to vaccine-preventable diseases (Odabaş \& Kuzlu Ayyıldız, 2021).

Despite scientific and historical evidence of the safety and effectiveness of vaccines and immunization, some groups are still hesitant and reluctant to accept vaccines and immunization. The concept of vaccine hesitancy was defined by the World Health Organization Strategic Advisory Group of Experts on Immunization (SAGE) Vaccine Hesitancy Working Group: "vaccine hesitancy is recognized as the delay or refusal to accept vaccines despite the availability of immunization services". These behaviors include refusal, delay or reluctant acceptance despite active concerns (Etesaminia \& Derinpınar, 2021). In our country, since 2010, negative media news about vaccines started to affect families and "vaccine refusal" started to be observed. As of 2015, the rates of vaccine refusal started to increase with the winning of the lawsuit on "obtaining parental consent for vaccine administration". While 183 families refused vaccination in 2011, 980 families in 2013, 5,400 families in 2015, 12,000 families in 2016 and 23,000 families in 2018 refused to vaccinate their children. It is stated that if the number of families refusing vaccines reaches 50 thousand, childhood infectious diseases that have been reduced or eradicated may cause an epidemic (Çıtak \& Aksoy, 2020). In this context, scientific studies should be conducted on the effects and side effects of vaccines, and effective communication and trust between parents and health personnel will be one of the most effective ways to eliminate hesitations about vaccination. In addition, the use of mass media and social media in informing and raising public awareness about the results of scientific studies on vaccines and their effects will enable rapid progress in the fight against "anti-vaccination". It is suggested that health personnel should be informed and raised awareness about the subject in order to make parents more aware of vaccine administration, appropriate vaccine counseling services should be provided for families against those who make anti-vaccine discourses, and educational programs can be prepared to increase the level of knowledge of parents about vaccines. (Argın et al., 2022).

Vaccine literacy encompasses the knowledge, motivation and competence to access, understand, evaluate and apply health information in order to make the right health decisions in daily life. Individuals with adequate vaccine literacy accept vaccination as a sine qua non of a functioning health system, undertake the task of vaccine advocacy in every environment they are in, and develop an uncomplicated system to ensure vaccine communication with other people (Şahin \& Baran Aksakal, 2022).

In a study, most of the participants stated that they obtained information about vaccines from the internet. Mothers emphasized that they frequently used social media for vaccines and other health issues, and that they were concerned about the information accessed and doubted about vaccines (Çıklar \& Döner, 2020). In a study examining the relationship between parents' e-health literacy and confidence in vaccines, it was found that parents' confidence in vaccines decreased as the e-health literacy level increased (Ceylan et al., 2022), while in another study examining the relationship between parents' health literacy and their attitudes and behaviors towards childhood vaccines, it was found that parents' health literacy level was not related to their attitudes and behaviors towards childhood vaccines (Ertuğrul \& Albayrak, 2021). In another study conducted with university students, it was found that as the health literacy level of university students increased, their anti-vaccine attitudes decreased (Ertaş \& Göde, 2021).

In a study, it was stated that the rate of vaccine refusal has reached serious dimensions, that this rate will increase further if measures are not taken, and that the most important of these measures is education. Therefore, it was reported that it is important to organize trainings on vaccines, especially in family health centers that provide primary health care services, and that active use of the media by health personnel on vaccination and vaccination is also required. at the same time, it was suggested that these trainings can also be done by meeting face to face with parents. as a result, it was reported that parents will be made aware of vaccination and a decrease in the rate of vaccine refusal will be observed (Huseynov, 2021).

In this study, our aim is to examine the effect of a web page developed on vaccine hesitancy of primiparous expectant mothers (pregnant women) on vaccine literacy and vaccine acceptance.