Everyone has been interacting with the outside world since birth, creating ideas about various objects or phenomena. The main aim of the research was to identify the concepts of primary school students about viruses. In addition to finding out the level of ideas, additional aims were to determine the effect of gender, the degree of education…

In an effort to reduce viral transmission, many schools are planning to reduce class size if they have not reduced it already. Yet the effect of class size on transmission is unknown. To determine whether smaller classes reduce school absence, especially when community disease prevalence is high, we merge data from the Project STAR randomized…