Official Websites Providing Information on COVID-19 Vaccination: Readability and Content Analysis

Andy Wai Kan Yeung   ^{1, 2} , PhD ;   Thomas Wochele-Thoma   ² , MD ;   Fabian Eibensteiner   ^{2, 3} , MD ;   Elisabeth Klager   ² , MSc ;   Mojca Hribersek   ² , MSc ;   Emil D Parvanov   ^{2, 4} , PhD ;   Dalibor Hrg   ^{5, 6, 7} , MSc ;   Sabine Völkl-Kernstock   ² , PhD ;   Maria Kletecka-Pulker   ^{2, 8} , PhD ;   Eva Schaden   ^{2, 9} , MD ;   Harald Willschke   ^{2, 9} , MD ;   Atanas G Atanasov   ^{2, 10} , PhD

¹ Oral and Maxillofacial Radiology, Applied Oral Sciences and Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong, China

² Ludwig Boltzmann Institute for Digital Health and Patient Safety, Vienna, Austria

³ Division of Pediatric Nephrology and Gastroenterology, Department of Pediatrics and Adolescent Medicine, Comprehensive Center for Pediatrics, Medical University of Vienna, Vienna, Austria

⁴ Department of Translational Stem Cell Biology, Research Institute of the Medical University of Varna, Varna, Bulgaria

⁵ Medical University of Innsbruck, Innsbruck, Austria

⁶ Department of Computer Science, University of Innsbruck, Innsbruck, Austria

⁷ Graz University of Technology, Graz, Austria

⁸ Institute for Ethics and Law in Medicine, University of Vienna, Vienna, Austria

⁹ Department of Anaesthesia, Intensive Care Medicine and Pain Medicine, Medical University of Vienna, Vienna, Austria

¹⁰ Institute of Genetics and Animal Biotechnology, Polish Academy of Sciences, Jastrzebiec, Poland