| When it comes to viral infections, past is prologue: The version of a virus to which we're first exposed can dictate how we respond to later variants and, maybe, how well vaccines work. It's a phenomenon known by the forbidding name of original antigenic sin, and, in the case of the coronavirus, it prompts a constellation of questions, including whether our immune systems are stuck still revving up defenses against a version of the virus that has vanished. |
| | | |  |  | | Must-read stories around major news events | | | Trending Now | Aug. 23, 9:37 a.m. EDT | | | | | When it comes to viral infections, past is prologue: The version of a virus to which we're first exposed can dictate how we respond to later variants and, maybe, how well vaccines work. It's a phenomenon known by the forbidding name of original antigenic sin, and, in the case of the coronavirus, it prompts a constellation of questions, including whether our immune systems are stuck still revving up defenses against a version of the virus that has vanished. | | | | | |
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