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home/Knowledge Base/Infectious Diseases

Viral Load in Upper Respiratory Tracts

45 views 0 04/03/2020 05/02/2020 Noémie Desgagnés

  1. Viral loads seems to be higher soon after the symptom onset, with higher viral loads detected in the nose than in the throat.
  2. The results suggest a potential transmission potential by asymptomatic or minimally symptomatic patients, as the viral load in the asymptomatic patient was similar to the symptomatic ones.

 

These data come from analysis of a study monitoring SARS-CoV-2 viral loads in upper respiratory samples obtained from 18 patients in China. A total of 72 nasal swabs and 72 throat swabs were analyzed, with 1 to 9 sequential samples per patient. One patient never had symptom. 

Source:

Zou L., Ruan F., Huang M., et al. (March 19, 2020) SARS-CoV-2 Viral Load in Upper Respiratory Specimens of Infected Patients. The New England Journal of Medicine, 382(12):1177-1179. DOI:10.1056/NEJMc200173

Tags:transmissionrisk factorsviral load

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