Based on log 2 -transformed serum anti-S IgG trends by vaccination status, the decay of serum antibodies among participants with no evidence of COVID-19 infection in the 90 days following full vaccination (β = −0.058) was greater than the decay observed from 270 to 349 days from vaccination (β = −0.043); however, this difference did not reach statistical significance ( P = 0.482).
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Kinetics of SARS-CoV-2 Serum Antibodies Through the Alpha, Delta, and Omicron Surges Among Vaccinated Health Care Workers at a Boston Hospital.
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0.4820
0.4820