Genomic surveillance, evolution and global transmission of SARS-CoV-2 during 2019–2022
Fig 6
(A) Probable origin and global transmission history of significant variants of concerns of SARS-CoV-2 with altered transmission rate, fatality rate and detection rate during the COVID-19 pandemic. During December, 2019 to January, 2022 about 7540558 whole genome of SARS-CoV-2 were traced worldwide. Four variants of concern including beta, gamma, delta and omicron with their probable transmission history were indicated by four different color lines. Star and circle indicated probable origin places. (B) Worldwide distribution of cumulative case, fatality and complete vaccination number of COVID-19 till 31 January, 2022.