The COVID-19 pandemic disrupted the learning process of more than 1.5 billion students and youth around the world. The abrupt and unplanned shift to online schooling had a negative impact on student learning and achievement, with the greatest challenges experienced by the most vulnerable...

Using the economic complexity methodology on data for disease prevalence in 195 countries during the period of 1990-2016, we propose two new metrics for quantifying the relatedness between diseases, or the 'disease space' of countries. With these metrics, we analyze the geography of diseases and...