The Environmental Protection Agency (EPA) is expected to make a decision soon regarding stricter regulations of polyfluoroalkyl compounds, or PFAS, which are chemicals in coatings meant to protect consumer goods from stains, water, and corrosion that have been found in drinking water; teenagers are turning to Reddit and other sites to figure out how to get vaccinated if their parents subscribe to antivaccine beliefs; Regeneron and Sanofi announced they are cutting the price of its proprotein convertase subtilisin/kexin type 9 inhibitor alirocumab (Praluent).