(CNN)Before just a few weeks ago, Stuart and Adrian Baker were perfectly healthy.
The inseparable couple had been married for more than 51 years and were living in Boynton Beach, Florida, in retirement. Neither of them had any serious health conditions. Then in mid-March, they started feeling ill.
On Sunday, they both died -- six minutes apart -- due to complications from Covid-19, their son Buddy Baker said.
Stuart Baker was 74. Adrian Baker was 72.
Buddy Baker, a longtime NFL agent, has been speaking publicly about the loss of his parents, using his family's tragedy to reiterate the seriousness of the global coronavirus pandemic. In a widely shared video on Twitter, he urged people to heed social distancing and stay-at-home recommendations from public health officials.
"Until it touches you or touches somebody you know or you hear a story, you kind of feel removed from it," Baker, president and CEO of Exclusive Sports Group, told CNN. "... Hopefully my parents' passing doesn't go in vain."
At first, the family was optimistic
Baker detailed the events leading up to his parents' passing in a phone interview with CNN.
About three weeks ago, Stuart and Adrian went to the doctor after they weren't feeling well, according to Baker. They were eventually sent home.
A few days later, their symptoms still hadn't improved so their doctor recommended that they visit the hospital. Baker said that they were also sent home from the hospital and told to self-quarantine until they felt better.
"This is pre- the world shutting down, pre- the NCAA tournament getting canceled, so you're still not thinking this is going to be something which is life threatening," he said.
Baker said he'd call to check on his parents regularly, but their health didn't seem to be improving. One day, they seemed to be on the up, and then the next day, they'd be feeling worse again.
After a few more days, on March 19, they were told to return to the hospital. Baker's father, who had a fever and also had asthma, was admitted. His mother, who did not have a fever, was not.
Despite the circumstances, Baker said he and his family were optimistic. They were talking to Stuart regularly on his phone, and it seemed like he'd be able to push through.
About 48 hours later, his father was admitted to the ICU -- but the family was still hopeful. Stuart went from being on 60% oxygen to 50%, a sign that things were going in the right direction.
Then, the couple started to deteriorate