There were curious characteristics about the H1N1 influenza pandemic of 1977-78, which emerged from northeastern Asia and killed an estimated 700,000 people around the world. For one, it almost exclusively affected people in their mid-20s or younger. Scientists discovered another oddity that could explain the first: It was virtually identical to a strain that circulated in the 1950s. People born b
![Opinion | Where Did the Coronavirus Come From? What We Already Know Is Troubling. (Published 2021)](https://cdn-ak-scissors.b.st-hatena.com/image/square/9ddd5abdf0446c8baa60b389c3bbc5f569e1666e/height=288;version=1;width=512/https%3A%2F%2Fstatic01.nyt.com%2Fimages%2F2021%2F06%2F25%2Fopinion%2F25tufeckiSub%2F25tufeckiSub-facebookJumbo.jpg%3Fyear%3D2021%26h%3D550%26w%3D1050%26s%3Df4ba4abee4a65d80a13947a05a2e574387994548f7e0dcfc295cd3c431c29f3f%26k%3DZQJBKqZ0VN)