Over the course of the COVID-19 pandemic, we have covered the issue of variants, virus mutations that affect the way SARS-CoV-2 moves around the globe and causes disease. One particular mutation, the delta variant, has been named a "variant of concern" by the CDC, and now accounts for upwards of 83% of new COVID-19 cases in the United States. In today's post, we'll cover 5 topics about the delta variant, providing you with some new and interesting facts about the variant that is in all the headlines.