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. 2020 Jun 12;69(23):714–721. doi: 10.15585/mmwr.mm6923e4

FIGURE 1.

The figure is a flowchart showing laboratory results among a convenience sample of U.S. service members aboard the USS Theodore Roosevelt who provided serum specimens (N = 382) and nasopharyngeal swabs (N = 267) for SARS-CoV-2 testing during April 2020.

Laboratory results among a convenience sample of U.S. service members who provided serum specimens* (N = 382) and nasopharyngeal swabs (N = 267) for SARS-CoV-2 testing — USS Theodore Roosevelt, April 2020

Abbreviations: Ab = antibody; ELISA = enzyme-linked immunosorbent assay; Inc = inconclusive; Neg = negative; Pos = positive; RT-PCR = real-time reverse transcription–polymerase chain reaction.

* Of those with positive serum ELISA tests, 59% demonstrated positive microneutralization tests.