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Estimated combined immunoglobulin N (IgG N) seropositive and immunoglobulin S (IgG S) seronegative phenotype prevalence in the hospital system and the community based on asymptomatic patients after February 15, 2021. The error bars represent ±1 SD of uncertainty. The positions of the months on the x-axis correspond to the week of data containing the first of that month.
