COVID‐19 transmission through asymptomatic carriers is a challenge to containment

3 He had radiological ground‐glass lung opacities, and he was RT‐PCR positive for genes encoding the internal RNA‐dependent RNA polymerase and surface spike protein of this novel coronavirus, which were confirmed by Sanger sequencing. 4 The father had clinical symptoms, a decreased lymphocyte count, abnormal chest CT images, and a positive result on qRT‐PCR. [...]vigilant control measures are warranted at this stage of the COVID‐19 epidemic to avoid a resurgence in cases.