Abstract Background Globally. two billion workers are employed informally but there is limited research on the relationship between informal work and health. Existing studies have focused on informality as an employment condition. with little emphasis on the diversity of physical and social contexts in which informal work takes place. https://echobookmarks.com/story19493330/evaluation-of-using-google-classroom-as-a-tool-for-asynchronous-e-learning-at-sebha-university