We have conducted a daily longitudinal analysis of SARS-CoV-2 vaccine breakthrough infections in two universities, UIUC and NU. We compared viral culture outcomes with nasal and saliva PCR results for up to 15 days and this is what we found. A thread 
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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Testing confounder? I have no idea if Iceland is doing full pop surveillance? Clearly severity better w vaxxed Delta vs unvax alpha.
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Regular, mundane COVID surveillance in Iceland is better than what people like us in surveillance wastelands call "studies".
End of conversation
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