More than 400 migrants rescued in the Mediterranean, 49 of whom have the coronavirus, arrived on the Italian island of Sicily.
The Ocean Viking docked at Augusta and health checks were carried out on the 422 migrants.
The search and rescue vessel, operated by French NGO SOS Méditerranée, made repeated requests for a safe place to land as a storm brewed in the Mediterranean.
The group said local health authorities informed the crew that 49 migrants - 41 of them adults - had tested positive for coronavirus.
The Italian health authorities have started testing survivors on the #OceanViking for COVID-19 as a first step of the disembarkation process in Augusta, Sicily.
— SOS MEDITERRANEE (@SOSMedIntl) February 8, 2021
The crew on the Ocean Viking will also undergo a mandatory quarantine of 14 days, starting today. pic.twitter.com/Om3l3FmLns
The migrants were rescued during several search and rescue operations in the Mediterranean between February 4 and 5.
SOS Méditerranée said eight of the migrants, who are mostly from sub-Saharan Africa, initially tested positive on the ship after being rescued.
They were isolated on the aft of the ship.
Italy granted permission for the vessel to enter Augusta on Sunday, and on Monday, Italian health authorities conducted more testing aboard the ship before allowing the migrants to disembark.
The migrants were rescued during four separate operations, with 121 of them found on a flimsy rubber dinghy.
On Saturday, a pregnant woman was flown with her partner by helicopter to Malta for treatment.
The Ocean Viking was blocked by Italy from carrying out rescues for five months, but since its return on January 11 it has rescued 798 people.
More than 1,200 migrants and asylum seekers died in 2020 while attempting to cross the Mediterranean, according to the UN’s migration agency.