A "healthy" single mum with no known pre-existing medical conditions has died four days after she received her second dose of the Moderna coronavirus vaccine.
Kassidi Kurill, 39, suddenly passed away on February 5 after she complained to her parents that "her heart was racing and she felt like she needed to get to the emergency room".
She was required to receive a vaccine due to her role as a surgical technician for several plastic surgeons in Utah.
It comes after four people died and a spate of 153 Utahns reported bad reactions after receiving at least one dose of a coronavirus vaccine, The Sun reports.
However, authorities have found no connection between the deaths and vaccines.
The same applies to reported deaths in Germany, Spain, Norway, Belgium, and Peru, where experts from multiple health authorities were unable to find causal links with vaccinations.
At least 130 million COVID-19 vaccinations have been administered in these countries, with around 350 post-vaccination deaths reported. Reports indicate these are due to pre-existing conditions, other infections and COVID-19, since some had only had one dose.
RELATED: Your vaccine questions answered
The Centers for Disease Control and Prevention has "not detected patterns in cause of death that would indicate a safety problem with COVID-19 vaccines."
COVID-19 vaccines remain the best option for protecting society and helping life return to normal. There is no evidence of long-term side effects from the jabs, while evidence is mounting that the disease itself leads to significant long-term health issues in those that contract severe cases, according to Australia's Department of Health.
Mother-of-one Kassidi received the vaccine due to her role as a surgical technician for several plastic surgeons in Utah and did so "without hesitation", according to her family.
She received her first dose of the Moderna vaccine and did not suffer from any notable side effects, except an inevitable sore arm.
But after receiving her second shot on February 1, her father Alfred Hawley told News4SA she "got sick right away."
Alfred, a retired fighter pilot, explained he was woken by Kassidi in the family home she shares with her parents and nine-year-old daughter, Kassidi Jr. Emilia, known as Millie.
"She came in early and said her heart was racing and she felt like she need to get to the emergency room," he said.
Her father said Kassidi experienced "soreness at the shot location" before she "then started getting sick, then started complaining that she was drinking lots of fluids but couldn't pee."
Kassidi "then felt a little better the next day" and enjoyed a shopping trip with her older sister Kristin, before she began feeling unwell that evening.
Her family was not immediately worried by her condition because "everyone from her work had flu-like symptoms, so we thought that was normal."
Over the following two days Kassidi remained in bed, before she feverishly woke her father up and asked him to drive her to the ER. After arriving, she began uncontrollably vomiting.
"They did a blood test and immediately came back and said she was very very sick, and her liver was not functioning," Alfred recalled. "It was a total shock and I was even afraid to tell my wife."
The 39-year-old was then flew to the Intermountain Medical Center in Murray, Utah, in preparation for a liver transplant to save her life.
Both her parents offered to donate a portion of their liver to save their daughter, but Kassidi's liver, kidney, and heart had shut down, despite her having no pre-existing medical conditions.
"She was healthy - happy and active. The greatest mom you ever saw in your life and then she was so sick that in less than 12 hours intubated and on life support," her distraught father continued.
A full autopsy was performed by the Utah State Medical Examiner but the results have not yet been released. Alfred said he "must believe there was something with the shot," until it is proven otherwise.
But the 69-year-old diabetic still decided to get his second dose of the vaccine, despite "Millie begging me not to".
Kassidi's only child will continue living with her grandparents as her civil servant father is a member of the National Guard who often serves overseas.
A GoFundMe has been set up to raise money for "mama's little sidekick" Millie's future.
Three other Utah natives have also died after receiving a jab.
According to data from Vaccine Adverse Event Reporting System, a woman aged 65 or older received the Pfizer vaccine in a senior living facility and died in January.
Another woman, whose age is unknown, received the Pfizer vaccine from an unknown distributor and died in January.
A man, aged 65 or older, received the Pfizer vaccine from a public distributor and died in February.
A woman in her 30s received the Moderna vaccine from a private distributor and died in February.
Doctors warn it's vital that you make time to get the second dose of the two-shot COVID-19 vaccine with the evidence suggesting you're most at risk of infection between the first and subsequent dose.
That's why getting vaccinated against COVID-19 in Australia will require two jabs and a possible booster shot later.
The most commonly reported side effects are pain at the injection site, tiredness, headache, muscle pain, chills, joint pain, and fever.
Experts say that in very rare cases there is a remote chance of a severe allergic reaction.
This story originally appeared on The Sun and is reproduced here with permission
Originally published as Mum dies after second COVID-19 jab