References

  1. World Health Organization. Pneumonia of unknown cause—China. January 5, 2020. Accessed April 20, 2020.

  2. World Health Organization. Novel coronavirus—China. January 12, 2020. Accessed April 20, 2020.

  3. Chan  JF-W , Yuan  S , Kok  K-H ,  et al.  A familial cluster of pneumonia associated with the 2019 novel coronavirus indicating person-to-person transmission: a study of a family cluster.   Lancet. 2020;395(10223):514-523

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