The US state department later said that 14 of the evacuees received had the virus, the report said. About 380 Individuals were on the cruise ship.
The president of the European Union Chamber of Commerce in China, Joerg Wuttke, said the world's pharmacies may face a shortage of antibiotics and other drugs if the outbreak can not be resolved soon, and accused Beijing of making supply-chain problems worse.
Passengers arriving to Travis Air Force Base will be housed in the same facility as evacuees who arrived from Wuhan earlier this month, a spokesperson for the base told CNN.
Carnival Corp, which operates both cruise liners, said it was cooperating with authorities in trying to trace other passengers from the Westerdam.
Some American passengers said they would pass up the opportunity to fly to the USA because of the additional quarantine.
Mr Coveney said the quarantine period on the Diamond Princess, where more than 450 people have tested positive for the virus, "ends tomorrow".
Even as the Americans were flying home and countries like Australia, Canada and South Korea were preparing to evacuate their own citizens, the Japanese health ministry announced Monday that 99 more cases had been confirmed on the cruise ship, bringing the total to 454.
Yesterday, the media reported that thus far, 455 passengers on board the cruise ship tested positive for Covid-19.
Health officials in China have released details about 45,000 confirmed and suspected cases of COVID-19 that originated in the country - saying that more than 80% were mild.
All of the passengers will undergo another 14 days of quarantine - meaning they will have been under quarantine for a total of almost four weeks. The letter told passengers that Yokohama health authorities would take their temperatures before they left the ship.
However, epidemiologists say it is probably still too early to say how well the outbreak is being contained within China and its central Hubei province, where the virus first appeared. Separately, one US citizen died in China. "Here I go again".
And all passengers are being "closely monitored" throughout the flight.
"If there are secondary bacterial infections on board, this is why", he stated. Obviously [quarantine] didn't work because it's too long a time, you've got air conditioning systems, you've got staff who need to service those people.
Around half of the passengers aboard the Diamond Princess are Japanese with the rest foreign nationals, many of whom have expressed frustration over the quarantine.