A C.D.C. airport surveillance program found the earliest known U.S. cases of Omicron subvariants.
![](https://static01.nyt.com/images/2022/03/23/multimedia/23virus-briefing-airport-atlanta/23virus-briefing-airport-atlanta-mediumThreeByTwo440.jpg)
By BY EMILY ANTHES from NYT Health https://ift.tt/6bm7Chx
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A C.D.C. airport surveillance program found the earliest known U.S. cases of Omicron subvariants.
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