Funding for this research was provided by:
Doctor research startup foundation of Changzhi Medical College (BS201912, BS201921)
Key Project of Qinghai Health and Family Planning Commission (2017-wjzd-08)
Received: 26 March 2020
Accepted: 15 July 2020
First Online: 22 July 2020
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Qinghai Center for Disease Control and Prevention, the related procedures were performed according to the guideline of National Influenza Surveillance Program (Edition 2017). The specimen was collected from nostril, posterior pharyngeal wall and bilateral tonsils by using sterile swabs gently, which was safety and non-invasive. Before the sample collection, all the subjects or their guardian were informed the purpose of this study, and signed the informed consent.
: Not applicable.
: The authors declare no competing interests.