Indeed, changes in the expression of dopaminergic and PD-related proteins, tyrosine hydroxylase (TH), Parkinson disease-5, autosomal dominant (PARK5; also known as ubiquitin carboxy-terminal hydrolase L1/UCHL1), and Parkinson disease 7, autosomal recessive early-onset (PARK7; also known as Parkinsonism-associated deglycase or oncogene DJ1) were also seen after COV exposure. This evidence concerns the gene UCHL1 and Parkinson disease.