Figure 1.
Neutralizing antibody titres in previously infected (n=23) and uninfected healthcare workers (n=13) tested at V0, V1_20, V2_20 and V2_90.
Data are reported as longitudinal course and as individual ID50 values at each study time
The same symbols indicate the same HCWs at different time points
ID50: reciprocal value of the sample dilution that showed a 50% protection of virus cytopathic effect
V0: before receiving the first dose
V1_20: 20±2 days after the first dose
V2_20: 20±3 days after the second dose
V2_90: 90±2 days after the second dose