During April 4–18, we detected an increasing trend of pool positivity among travelers on South African flights, detecting one of the first US-reported BA.4 sub-lineages consistent with early surge of cases in South Africa.
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1525. The Impact of Traveler-Based Genomic Surveillance on SARS-CoV-2 Variant Detection in Arriving International Air Travelers– United States, November 29, 2021-April 24, 2022
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