SARS-CoV-2(8) COVID-19(7) Mutation(6) information(6) Frequency(6) Analysis(6) Result(5) supplementary material(5) SARS-CoV-2.(4) database(3) indication(3) the S protein(3) Transmission dynamics(3) National(3) linear regression models(3) Regression model(3) correlation(3) Combination(3) prevalent(3) protein structure(3) COVID-19 infections(3) changes in(3) Viral virulence(3) S protein(3) nucleotide(3) Local(3) lead(3) provide(3) Characteristics(3) specific mutations(3)