Ferrer had experienced intense physical pain due to symptoms of long-haul COVID-19 in the months and days beforehand, her husband Nick Guthe – also an esteemed writer and director – told Fox News on Friday.

"My beautiful angel, Heidi, passed over tonight after a 13 month battle with Long Haul Covid," Guthe wrote on Twitter and in an emotional post shared to Ferrer's personal blog.

In his post, Guthe noted that Ferrer had received a COVID-19 vaccine.

"A lot of people with long-haul COVID have been told the vaccine might help them fight the virus," he elaborated to Fox News.

In detailing Ferrer's life up to her death, Guthe stressed the importance of listening to patients and identifying which symptoms could be cause for concern among people living with long-haul COVID.

Heidi Ferrer and her husband Nick Guthe.

While Guthe pressed that he's "very pro-vaccine" and his son, who is 13, "will be receiving the second vaccine," the writer said he didn’t "necessarily think people with long-haul COVID should be rushing to get vaccinated.".

Guthe explained that Ferrer was unable to be referred to a long-haul COVID clinic as she hadn’t yet tested positive for the virus in April or May 2020; many earlier tests had proven to be inaccurate.

Bruce Patterson, who was an AIDS pioneer in the 1980s and has been studying long-haul COVID," Guthe said, adding that through Patterson’s basis of testing for long-haul COVID, Ferrer’s doctor was finally willing to refer her to the long-haul COVID clinic at Cedars-Sinai in Los Angeles. .

"We got that letter of recommendation the day before Heidi took her life," Guthe said of his wife, whom he described as "an American success story." .

For years, Ferrer worked as a hostess "to pay for her life," while writing relentlessly during the days and afternoons, Guthe said. .

Guthe said Ferrer was "very open about her battles with alcoholism" and had a history of addiction and suicide in her family as her own father took his life when the couple’s son – who suffered from infantile scoliosis – was just four months old. 

"The stress of my son's illness contributed to her drinking, but she battled back, though," Guthe said, adding that Ferrer had been sober for three-and-a-half years when she ultimately took her life. 

Ferrer experienced intense physical pain due to symptoms of long-haul COVID-19, Guthe – also an esteemed writer and director – told Fox News on Friday

Above all, Guthe said Ferrer "just loved seeing her words come to life."