American Society for Microbiology, Microbiology Spectrum, 5(10), 2022
DOI: 10.1128/spectrum.01315-22
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Live viral neutralizing antibody titers are an accepted measure of immunity; however, testing procedures are labor-intensive. COVID-19 antibody and angiotensin converting enzyme-2 (ACE-2) levels have been used as surrogates to live viral neutralizing antibody titers; however, validity among vaccinated individuals is unclear.