Fig. 4From: The value of serum neutralizing antibody in evaluating predictability of COVID-19 after recovery and the validation of vaccineThe dynamic change of Nabs of COVID-19 patients at different time points. (A) The level of Nabs was elevated during 0–132 days; (B) The level of Nabs first increased then decreased; (C) The level of Nabs first decreased then increased; (D) The level of Nabs repeatedly fluctuatedBack to article page