Table 1.

Characterization of the study population and frequency of symptoms and signs related to COVID-19 in 76 non-Omicron SARS-CoV-2 infected healthcare workers

Characteristic	n	%
Total no. of patients	76	100.0%
Age, median (IQR)	37.0	(30.0–47.8)
Gender
Male	30	39.5%
Female	46	60.5%
Occupation
Medical Doctors	13	17.1%
Nurses	16	21.0%
Health technicians	22	28.9%
Others	25	32.9%
Direct contact with COVID-19 patients (frontline)	47	61.8%
Severity of the disease
Asymptomatic	3	3.9%
Symptomatic without fever	45	59.2%
Symptomatic with fever	23	30.3%
Hospitalization	5	6.6%
Most common symptoms
Headache	48	63.2%
Myalgia	47	61.8%
Cough	42	55.3%
Fever	25	32.9%
Sore throat	23	30.3%
Anosmia	23	30.3%
Time from onset of symptoms (days) to blood sample collection, median (IQR)a
First sample (2 months)	62.0	(59.0–65.0)
Second sample (4 months)	121.0	(117.0–124.0)
Third sample (6 months)	180.5	(177.0–184.8)

^aIn asymptomatic HCW the date of PCR assay was used