3 container ships under quarantine in Santos Brazil. Something wrong with Santos?

May 16, 2020 Maritime Safety News

14 crew of container ship LOG IN JATOBA were found virus test positive in Santos port, Brazil, according to The National Health Surveillance Agency (Anvisa) official statement issued on May 14. The ship – understood after completing cargo operations – was taken on Santos outer Anchorage, and put under quarantine, which will last until May 26. Container ship MSC GISELLE is under quarantine since May 9 until May 23, also anchored. Understood there was one test positive crew, he was taken to hospital. Container ship BARBARA is under quarantine until May 17, Santos outer Anchorage – see details here https://www.fleetmon.com/maritime-news/2020/29633/panamax-container-ship-under-quarantine-until-may-/
Also, there are 4 cruise ships stuck in Santos, all with crew only: MSC SEAVIEW (quarantine to end on May 15, no corona cases), COSTA FASCINOSA (no corona cases); MSC MUSICA (quarantine ended May 5); MSC POESIA (no test positive cases, no quarantine).