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. 2020 Jun 21:ciaa797. doi: 10.1093/cid/ciaa797

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© The Author(s) 2020. Published by Oxford University Press for the Infectious Diseases Society of America. All rights reserved. For permissions, e-mail: journals.permissions@oup.com.

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Figure 1. — Breakdown of respiratory specimens received during the study period. Between 1 February 2020 and 15 April 2020, a total of 13772 specimens for SARS-CoV-2 testing were received from inpatients in the Kowloon Central Cluster, as well as ambulatory patients and asymptomatic patients from different surveillance programs and clinical settings. Subgroup head-to-head comparison of posterior oropharyngeal saliva with nasopharyngeal specimens were performed on the 229 posterior oropharyngeal saliva when concurrent nasopharyngeal specimen taken on the same day from the same patient. Abbreviations: COVID-19, coronavirus disease 2019; NPA, nasopharyngeal aspirates; NPA/T: nasopharyngeal aspirate pooled with throat swab; NPS, nasopharyngeal swabs; NPS/T: nasopharyngeal swab pooled with throat swab; POPS, posterior oropharyngeal saliva; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2.