Updates are available Expression of concern dated 2021-08-03

Click to view Expression of concern: https://doi.org/10.1007/s00705-021-04956-9

Retraction Retraction dated 2021-11-22

Click to view Retraction: https://doi.org/10.1007/s00705-021-04956-9

Retraction Retraction dated 2021-11-22

Click to view Retraction: https://doi.org/10.1007/s00705-021-05307-4