As shown in Figure 2 , time elapsed since receipt of last vaccine dose had no significant impact on SARS‐CoV‐2 RNA loads in the URT for either BA.1 or BA.2, although a clear trend towards higher viral loads with time since vaccination was evident for BA.2 but not for BA.1.
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SARS-CoV-2 RNA load in nasopharyngeal specimens from outpatients with breakthrough COVID-19 due to Omicron BA.1 and BA.2.
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