When Covid cases were rising in the U.S., the news coverage emphasized the increase. When cases were falling, the coverage instead focused on those places where cases were rising. And when vaccine research began showing positive results, the coverage downplayed it, as far as [Dartmouth professor Bruce] Sacerdote could tell. He began working with two other researchers, building a database of Covid coverage from every major network. The researchers then analyzed it with a social-science technique that classifies language as positive, neutral or negative. The results showed that Sacerdote's instinct had been right. The coverage by U.S. publications with a national audience has been much more negative than coverage by any other source that the researchers analyzed, including scientific journals, major international publications and regional U.S. media. About 87 percent of Covid coverage in national U.S. media last year was negative. The share was 51 percent in international media, 53 percent in U.S. regional media and 64 percent in scientific journals. Notably, the coverage was negative in both U.S. media outlets with liberal audiences (like MSNBC) and those with conservative audiences (like Fox News). If we're constantly telling a negative story, we are not giving our audience the most accurate portrait of reality. As Ranjan Sehgal, another co-author, told me, "The media is painting a picture that is a little bit different from what the scientists are saying."