Table 1.

Rate of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) reverse-transcription polymerase chain reaction (RT-PCR) positivity in different biological sources collected from patients with coronavirus disease 2019 (COVID-19)

Biological source	Detection rate
Bronchoalveolar lavage fluid	>90%
Saliva	80-100%
Sputum	70-80%
Nasopharyngeal AND oropharyngeal swabs	70-80%
Nasal swabs	40-70%
Pharyngeal swabs	30-50%
Stool	30-45%
Throat wash	~30%
Blood	5-20%
Urine	3-9%
Breastmilk	<1%
Peritoneal fluid	<1%
Semen	<1%