Funding for this research was provided by:
US CDC cooperative agreement (5U19GH000635-04)
Received: 6 September 2018
Accepted: 31 July 2019
First Online: 3 September 2019
Ethics approval and consent to participate
: This evaluation was approved by the Chinese Center for Disease Control and Prevention Institutional Review Board (Number: 201534) and was determined to be non-research public health practice by US CDC. All patients participating in this evaluation, or their parent or guardian for patients < 18 years of age, provided oral informed consent prior to interview and written informed consent prior to throat swab collection.
: Not applicable.
: The authors declare that they have no competing interests.