Invisible outbreaks sprang up everywhere. The United States ignored the warning signs. We analyzed travel patterns, hidden infections and genetic data to show how the epidemic spun out of control. Invisible outbreaks sprang up everywhere. The United States ignored the warning signs. We analyzed travel patterns, hidden infections and genetic data to show how the epidemic spun out of control.
![How the Virus Won (Published 2021)](https://cdn-ak-scissors.b.st-hatena.com/image/square/46cdb15fd646adb94b4cc6682db441f22f8fc40b/height=288;version=1;width=512/https%3A%2F%2Fstatic01.nyt.com%2Fimages%2F2020%2F06%2F25%2Fmultimedia%2Fus-coronavirus-spread-promo-wider%2Fus-coronavirus-spread-promo-wider-facebookJumbo.jpg%3Fyear%3D2021%26h%3D471%26w%3D900%26s%3D80f5f68b861bfed307655c9884b16c352733df50806ff2c63c0ee1170874ce14%26k%3DZQJBKqZ0VN)