New Petersburg COVID case from visiting cruise ship Posted by Joe Viechnicki | Jul 9, 2021 Boats tied up in Petersburg’s South Harbor (Joe Viechnicki/KFSK) Petersburg Medical Center Thursday reported another COVID-19 case in Petersburg. The latest positive comes from a passenger visiting from out-of-state on a cruise ship. It’s the third case reported in Petersburg this week after several weeks without any active cases. A press release from the medical center does not identify the cruise ship. Petersburg had one on the schedule in port for Thursday and two on Friday, July 8th and 9th. According to their websites, all the small ship cruise lines now calling in Petersburg require COVID vaccination for their passengers who are old enough to receive a shot. Some of those ships have their passengers visiting local shops and circulating in the community while others are opting to keep separate.