The new coronavirus was first identified in China in December 2019 and then, it created a widespread pandemic around the world. There is currently no definitive cure for it and it will not be possible to make a vaccine soon. Pathogenic mechanism of the virus includes virus entry, binding to angiotensin-converting enzyme 2 (ACE2) receptors on the surface of host cells, proliferation, membrane fusion, assembly, subsequent infection, cytokine secretion, and the host immune response to the virus. By identifying at what stage the patient is, possible effective drugs can be used to control each stage. Therefore, identifying the mechanism of action of the virus in different stages of the disease makes it possible to use the appropriate drug for each stage of the disease and control the disease.

Mitochondria contain their own DNA (mtDNA), which codes for 13 proteins (all subunits of the respiratory chain complexes), 22 tRNAs and 2 rRNAs. Several mtDNA point mutations as well as deletions have been shown to be causative in well-defined mitochondrial disorders. A mixture of mutated and wild type mtDNA (heteroplasmy) is found in most of these disorders. Inheritance of mtDNA is maternal, and mothers with heteroplasmic mtDNA transmit different proportions of normal and mutated mtDNA to the children. Mitochondrial tRNA genes have a central role in mitochondrial gene expression at the level of transcription, RNA processing and protein synthesis and they appear to be the mitochondrial genes most frequently affected by mutations causing diseases in man.