Persistence and baseline determinants of seropositivity and reinfection rates in health care workers up to 12.5 months after COVID-19

Table 1 Characteristics of the suspected SARS-CoV-2 reinfection cases

Socio demographics	First COVID-19 episode		Second COVID-19 episode		Serology
Socio demographics	Symptoms^a	PCR	Symptoms	PCR	Serology
Female, 29-year-old nurse	March 15–May 14	Positive: April 2 Negative: April 22	October 13–December 23	Positive: October 13	Seronegative September/Seroconverted October
Female, 41-year-old physician	March 24–May 25	Positive: March 27 Negative: April 21, May 4	August 2020–Jan 2021	Positive: August 25, September 8 Negative: October 9	Seronegative May & August/Seroconverted September
Female, 58-year-old administrative	March 23–March 25	Positive: March 23 Negative: April 6	May 20–May 22	Positive: May 21, June 4, 11, 18 Negative: June 25	Unknown April/Seropositive November
Female, 44-year-old physician	March 23–April 3	Positive: March 25 Negative: April 4	None	Positive^b: November 19	Seropositive^c September

^aDate of start and end of the first and last symptoms. All dates are 2020 unless otherwise indicated
^bPCR was done prior to an unrelated surgical procedure and not as part of any routine COVID-19 screening, the participant had no symptoms
^cLow-level antibody responses above the seropositivity threshold

ISSN: 1741-7015