A multimethods randomized trial found that plain language versions improved adults understanding of health recommendations

In this 2024 study, the researchers conducted a randomized controlled trial of adults. The trial involved World Health Organization recommendations for the COVID-19 vaccine. The control group received the original standard language versions, while the intervention group received plain language versions. The researchers concluded that the plain language versions enhanced understanding, accessibility, usability, and satisfaction with the content compared to the standard language versions.