California truck driver Tommy Macias wrote a tragic last message a day before dying of coronavirus disease 2019 (COVID-19) on June 21.

In a Facebook post, the 51-year-old truck driver said he regretted attending a barbecue party with friends. Macias believed that he contracted the coronavirus at the party. After isolating for months, this error cost him his own life.

According to a report from LA Times, Macias did not know that someone at the party tested positive for COVID-19, but only asymptomatic or showed no symptoms of the disease.

Over 10 other people who were in the party also tested positive for the coronavirus, said Macias' 52-year-old brother-in-law Gustavo Lopez.

Lopez told NBC that from March until early June, Macias was following health guidelines and had only gone out when needed. He wore a mask whenever he went out and limit his outside activity.

It was only on that early June barbecue party that Macias went out 70 miles to Lake Elsinore town. The restrictions were slowly being lifted and the truck driver, "who could never sit still in his life" felt it was safe to go out again.

Lopez said what happened to Macias was preventable. "That person knew he had corona and still went," he said.

Danielle Lopez, Macias' niece, said "I don't know if they ever [showed] symptoms and they were feeling better and thought they were over it," the FOX 11 Los Angeles reported.

In his Facebook post, Macias said his experience was painful and he endangered his family's lives because of his actions. He also asked others to wear a mask when going out and practice social distancing.

"I went out a couple of weeks ago... because of my stupidity I put my mom and sisters and my family's health in jeopardy," he wrote.

"This has been a very painful experience. This is no joke. If you have to go out, wear a mask, and practice social distancing... Hopefully with God's help, I'll be able to survive this," he added.

Macias fell ill in June 15 and thought it was only because of his diabetes. He seemed to be recovering at first. This gave his family hope. He tested positive for COVID-19 later on.

On a Sunday morning, he called his mother and sisters to say he could not breathe. His brother-in-law knew it wasn't "going well" for Macias and feared the worst.

"There was a high probability he wasn't going to make it," he said.

Norma Macias Norris, his sister, rushed to her brother's home to find ambulance attendants had already taken him. She wanted so badly to sit by his bedside and tried to follow him at the hospital, but she was told she can't stay.

They talked over the phone and Macias Norris recalled her brother saying his last words to her while breathing heavily and crying, "I want to go home, Sis."

In 10 hours, Macias had to be get his oxygen intake raised and was put on a ventilator. That night, the family received a call from the hospital saying the man had died. The Riverside County coroner's office confirmed the death was related to COVID-19.

Daily Mail reported that over 6,000 people had tested positive for the virus in California alone on Wednesday. Hospitals and intensive care units had higher admissions too.

The numbers made Governor Gavin Newsom promise to roll back plans on reopening. Some beaches also closed for the fourth of July weekend. Newsom also recommended the cancellation of large firework displays.

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