public healthScienceA Wisconsin City Experiments With a Faster, DIY Covid-19 TestBy Gregory BarberScienceTo Navigate Risk In a Pandemic, You Need a Color-Coded ChartBy Maryn McKennaScienceWhat Does It Mean to Say a New Drug ‘Works’?By Adam RogersScienceUniversities Need Covid-19 Tests to Reopen. Few Have ThemBy Gregory BarberIdeasThe US Is Paying Way Too Much for RemdesivirBy Rohan Chalasani and Walid GelladScienceHydroxychloroquine Still Doesn’t Do Anything, New Data ShowsBy Adam RogersScienceLlamas—Yes, Llamas—Could Help Us Fight Covid-19By Grace HuckinsIdeasThe Latest Covid Party Story Gets a TwistBy Gilad EdelmanScienceThe Tricky Math of Herd Immunity for Covid-19By Kevin HartnettScienceHow a ‘Heat Dome’ Forms—and Why This One Is So PerilousBy Matt SimonScienceCovid Kills More Men Than Women. Experts Still Don't Know WhyBy Grace HuckinsScienceLarry Brilliant on How Well We Are Fighting Covid-19By Steven LevyIdeasAmerica Has a Sick Obsession with Covid-19 PollsBy Roxanne KhamsiScienceHow to Read Covid-19 Research (and Actually Understand It)By Sara HarrisonScienceTech That Could Help Pro Sports Adapt to the PandemicBy Eric NiilerScienceA Mathematician’s Guide to How Contagion SpreadsBy Gregory BarberIdeas‘Covid Parties’ Are Not a ThingBy Gilad EdelmanScienceHow Masks Went From Don’t-Wear to Must-HaveBy Megan Molteni and Adam RogersIdeasWomen’s Roller Derby Has a Plan for Covid, and It Kicks AssBy Christie AschwandenScienceWhere Should Covid-19 Vaccines Be Tested?By Maryn McKennaScienceVaccine Makers Turn to Microchip Tech to Beat Glass ShortagesBy Megan MolteniIdeasIt’s Ridiculous to Treat Schools Like Covid Hot ZonesBy David ZweigScienceSheltering in Place Works—if You Can Afford to Stay HomeBy Gregory BarberIdeasIf the Virus Slows This Summer, It May Be Time to WorryBy Roxanne KhamsiMore Stories