More than 100 Americans who were on the Diamond Princess cruise ship have finally gone home. 2 shared photos and details from their quarantine on a military base.

Fehrenbacher, 29, and Christoph, 25, went on the cruise as a break from their graduate studies at Tianjin Foreign Studies University in Tianjin, China. They traveled with two other friends who declined to be named in this story.

Fehrenbacher grew up in Washington, Virginia, and Colorado. Christoph is from the Chicago area.

Christoph and Fehrenbacher didn't know it at the time, but a sealed box on the flight was holding people who had already tested positive for the coronavirus.

The Washington Post reported that CDC officials had argued against the decision to have sick and healthy people fly on the same plane. The sick people's tests had come back positive after they had already begun leaving the cruise ship and boarding their buses.

The CDC lost that argument on the tarmac, The Post reported, then insisted the agency be left out of the news release announcing that 14 infected Americans had shared a plane with more than 300 others.

"Every single person, first thing they said was 'welcome home,' 'welcome home, sir,'" Fehrenbacher said of his arrival.

"You hear 'welcome home' 100-plus times in a situation like that, it's very emotional. It's very heartwarming," he added. "It kind of makes it a little more clear how dramatic the situation that you've just gone through actually is."

But, Fehrenbacher said the people who brought his food and checked his temperature were largely volunteers.

"If there's ever anything that you need, you have a number of phone numbers that you can call," he said.

The "literal cabin fever" made the two-week quarantine on the ship more difficult, Christoph said.

"It can get dull or just kind of stressful at times." he said. "We all had our moments of just frustration."

Having more space made the US quarantine a bit easier, he added.

The first thing Fehrenbacher did when he got to his own apartment was shower.

"I used probably half a bar of soap trying to just feel clean again," he said. "I wanted nothing in the world more than just to be clean."

He couldn't quite relax yet, though — the evacuees were still waiting for the results of one more round of COVID-19 testing.

"The time that I felt like I was at the highest risk of exposure was when we were being evacuated," Fehrenbacher said. "I was still concerned that, OK, let's hope that I don't have this virus. Because every time I had to clear my lungs, I was worried that I had it."

"They go into an apartment, they come out a couple minutes later, and they would kind of help one another take the gown off, throw it in the trash, take the gloves off, put hand sanitizer on, and then put new gloves on, put another gown on, and take the trash can and walk to the next apartment," he said.

They read him a script that said he still needed to monitor his symptoms and then moved on.

"It took a few minutes to process. My dad was the first person that I called," Fehrenbacher said.

Fehrenbacher and his father, Scott, had been talking daily since the beginning of the Diamond Princess quarantine. Scott Fehrenbacher told Business Insider that he noticed the psychological toll the ordeal took on his son.

"It's as much mental as it is physical," he said. "The number of times he's had to wait for the grim reaper to show up at his door."

On the Diamond Princess, Christoph and Fehrenbacher had been confined to their room and its small balcony. Passengers with balcony-less rooms got a few minutes each day to walk around the ship's deck.

Other people would walk around the lawns, sunbathe, and do calisthenics, Fehrenbacher said.

"As long as you always keep the mask on and stay 6-plus feet away from each other, it should be fine," Christoph said. "I love to go out there and break a sweat. It helps me sleep at night."

"We went on a late-night walk, which is quite the experience because the whole yard is lit by these giant floodlights," he said. "There's at least three or four cars and trucks with US Marshals sitting in them to keep watch around the perimeter."

He said he and Christoph sometimes went into the laundry rooms, which were often filled with extra supplies, to see what kind of loot they could find. Sometimes there were bottles of lotion or shampoo, cases of soda, or boxes of cookies.

"The best thing that I've gotten at this point was a bottle of hand sanitizer," Fehrenbacher said.

"Like lasagna with mashed potatoes, or breakfast — a lot of scrambled eggs, bacon, and hashbrowns," he added.

The Diamond Princess offered passengers free alcohol, so Fehrenbacher Christoph said they ordered it regularly for the first few days.

"Being somebody who doesn't normally spend $42 on a bottle of wine, that was a really nice treat in the middle of a quarantine," Fehrenbacher said.

But the military base did not offer evacuees that luxury.

"I do miss having a cold beer every once in a while," Christoph said.

"We asked about it, but they wouldn't offer additional tests unless a person started to show symptoms," Fehrenbacher said.

Authorities estimate the virus's incubation period at 14 days, though a couple of studies have suggested it could be as long as 19 or 24 days.

The CDC did not respond to a request for comment.

"I only know that anyone who was in close contact with someone who tested positive had to restart their 14-day quarantine," he said.

The CDC reports that 45 people who returned to the US from the Diamond Princess have tested positive for COVID-19.

"The last 20-some days quarantined on a ship and then here, I guess it's just kind of a free meal and a free bed," he added.

Fehrenbacher said he's excited to be with his family again — his parents live in Canada, and he plans to go stay with them. But he added that he's nervous about what the interaction with customs will be like. He's preparing for the chance that Canadian officials will ask him to complete another 14 days of isolation.

"If there's one thing I'm learning in this quarantine, it's that you just have to be OK with the absolute unexpected happening and just having to roll with the punches," he said.

• Read more:
• 2 US grad students who were on the Diamond Princess cruise share harrowing details and photos from their quarantine and 'zombie movie' evacuation
• A day-by-day breakdown of coronavirus symptoms shows how the disease, COVID-19, goes from bad to worse
• 12 tips to lessen the chances of getting sick while riding trains, subways, and buses in the age of coronavirus, according to experts
• A man from a NYC suburb was confirmed to have coronavirus. Here's what New York's mass-transit system is doing to slow a potential spread.