Table 1.
Baseline characteristics of the matched cohort.
Fig 1.
Flow chart of the study cohort.
Patients tested using the modified two-tier test (MTTT) protocol and the standard two-tier test (STTT) protocol were matched by age, sex, test month and year, and state of residence.
Table 2.
Test positivity using MTTT vs STTT.
Fig 2.
Comparison of IgM and/or IgG positivity using the modified two-tier test (MTTT) protocol with the standard two-tier test (STTT) protocol.
Distributions of IgM and/or IgG among individuals who tested positive are shown.