A COVID-19 nucleic acid was detected in 32 swabs collected during patient screening. The detection rate was 1.3%. COVID-19 nucleic acid was detected in the stool specimens of 8 positive patients examined. However, COVID-19 nucleic acids were not detected in tear samples from 10 positive patients. During the same period, the detection rates of patients with influenza A and B were 2.3% and 3.3%, respectively (Table 2 ).
Table 2 Types of nucleic acid test specimens.
Specimen type COVID-19 Influenza A Virus Influenza B Virus
Positive cases-No., % Test cases Positive cases-No., % Test cases Positive cases-No., % Test cases
Pharyngeal swab 32 (1.3) 2510 57 (2.3) 2510 84 (3.3) 2510
Feces 8 (19) 43 0 6 0 6
Serum 0 31 2 (13) 15 2 (13) 15
Sputum 0 15 0 15 0 15
Bronchial lavage 0 1 0 1 0 1
Nasal swab 0 6 / / / /
Whole blood 0 1 / / / /
Tear 0 10 / / / /