**Authors' contributions**

Vakulenko D. V. developed the concept and design of the work. Registered AOG downloaded to a PC and subjected to temporal, spectral, correlation analysis using the OscEcgReoPuls program, developed by the authors of the study; conducted statistical processing, analysis, interpretation of the results; participated in the design of the article.

Vakulenko L. O. – co-author of the methods of temporal, spectral, correlation analysis of AOG; made a significant contribution to the concept and design of work; conducted analysis and interpretation of AOG data; participated in the design of the article.

*Aplication Arterial Oscilography to Study the Adaptive Capacity of Subject with COVID-19… DOI: http://dx.doi.org/10.5772/intechopen.98570*

Hryshchuk L. A. conducted examination, treatment, registration of AOG in patients with COVID-19; participated in the analysis and interpretation of AOG data.

Sas L. M. conducted examination, treatment, registration of AOG in patients of the closed department of the psychoneurological hospital; participated in the analysis and interpretation of AOG data.
