Funding for this research was provided by:
This work is part of Kazan Federal University Strategic Academic Leadership Program (Priority-2030).
Article History
Accepted: 28 July 2022
First Online: 2 September 2022
Declarations
:
: The ethics committee of the Kazan Research Institute of Epidemiology and Microbiology of Rospotrebnadzor approved this study, and signed informed consent was obtained from each COVID-19 convalescent and control subjects according to the guidelines adopted under this protocol (Protocol 4/09 of the meeting of the ethics committee of the KSMA dated September 26, 2019).
: The authors declare no competing interests.
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