A King County, Washington, woman originally from Portland has died from a rare blood clotting syndrome after receiving the Johnson & Johnson COVID-19 vaccine.

SEATTLE - A Seattle woman originally from Portland has died from a rare blood clotting syndrome after receiving the Johnson & Johnson COVID-19 vaccine, according to a statement posted online by Public Health -- Seattle & King County.

Jessica Berg Wilson, 37, was vaccinated on August 26 and died on September 7 from thrombosis with thrombocytopenia syndrome, known as TTS. It's a rare and potentially deadly clotting event that has been linked with the J&J vaccine.

According to her obituary, she was an Oregon State graduate who was "vehemently opposed" to taking the vaccine, but eventually took it so she could continue volunteering at her children's school. 

Her family released the following statement this week after news of her death spread: 

The family is grateful for your interest in the tragic death of our dear Jessica.

As you recognize, this is a difficult and emotional time for us. When we gathered to celebrate her remarkable life that was filled with love for so many, we sought to acknowledge the tragic truth of the events that took her life while placing our emphasis on the caring love she brought to family and community.

Washington woman with Oregon ties dies from rare J&J vaccine complication

Jessica Berg Wilson (family photo)

Likewise, when we spoke of her legacy in an obituary, we addressed the tragic events that took her life while also focusing on all the blessings she brought to this world. Never did we expect the stunning and overwhelming public outpouring of support, compassion, and love that has materialized. The response of the public has left us humbled. At this point, we wish to convey to everyone who joined in honoring the memory of Jessica that we are forever grateful for their kind words and their prayers. Many of those who responded expressed heartfelt gratitude that we were able to bear witness to a tragic truth that they also have experienced. We hold those souls in our prayers along with Jessica. In most cases these victims who have also suffered harm are not being heard.

With this in mind, we must tell you we have little to add to Jessica’s story, but we pray you will tell the many, many stories of those similarly afflicted. We pray you will turn to them and bring your resources to the task of giving voice to their pain.

Thank you, in advance, for your efforts to bring light where there has been darkness.

May God bless you.

Public Health -- Seattle & King County said the diagnosis was confirmed by the US Centers for Disease Control and Prevention's Clinical Immunization Safety Assessment Project. CDC has reported three other confirmed TTS deaths nationally, the release said.

"The safety and well-being of every individual who receives a Johnson & Johnson product remains our top priority," a spokesperson at J&J told CNN.

"Any adverse event report about individuals receiving Johnson & Johnson's single-shot COVID-19 vaccine, as well as our own assessment of the report, is shared with the U.S. Food and Drug Administration (FDA), European Medicines Agency, the World Health Organisation (WHO) and other appropriate health authorities where our vaccine is authorized," the spokesperson added.

"We strongly support raising awareness of the signs and symptoms of the rare events described in the FDA Factsheet for the vaccine, to ensure they can be quickly identified and effectively treated."

In a statement, the CDC said it was aware of the case and the report "indicates a plausible causal relationship between the J&J/Janssen COVID-19 Vaccine and TTS." The agency said it will release updated information on TTS cases later this year.

Washington woman with Oregon ties dies from rare J&J vaccine complication

Jessica Berg Wilson (family photo)

Earlier this year, the CDC and US Food and Drug Administration recommended a pause in the use of the J&J COVID-19 vaccine after a small number of reports of blood clots among people who had received the Johnson & Johnson vaccine, most of them women younger than 50. Use of the vaccine resumed shortly after with a new warning about the risk of blood clots, and clear instructions for health care providers about the particular treatment required.

Health officials said the Johnson & Johnson was safe and effective, and the benefits of the single-shot vaccine far outweighed the risks.

Severe blood clots are just one of many serious risks from COVID-19; the virus has caused more than 700,000 deaths in the United States. More than 186 million people in the United States have been fully vaccinated -- nearly 15 million received the Johnson & Johnson vaccine -- with few serious side effects.

TTS "is rare, occurring at a rate of about 7 per 1 million vaccinated women between 18 and 49 years old. For women 50 years and older and men of all ages, this adverse event is even more rare," the CDC says.

CDC says people who received the Johnson & Johnson vaccine should look out for symptoms of a blood clot with low platelets for several weeks after vaccination, and should seek medical care immediately if they identify any. Symptoms include: "severe or persistent headaches or blurred vision, shortness of breath, chest pain, leg swelling, persistent abdominal pain" and "easy bruising or tiny blood spots under the skin beyond the injection site." It can be treated with anticoagulants other than heparin.

There is no increased risk of TTS after vaccination with the Pfizer-BioNTech and Moderna vaccines, CDC says. "Women younger than 50 years old, especially, should be aware of the rare but increased risk of this adverse event, and they should know about other available COVID-19 vaccine options for which this risk has not been seen," the agency says.

TTS has also been linked to AstraZeneca's coronavirus vaccine, which is not authorized for use in the United States, but is widely used in other countries. Both the AstraZeneca and J&J vaccines use a common cold virus called an adenovirus to carry the vaccine's active ingredients into the body.

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CNN's Lauren Mascarenhas and Michael Nedelman contributed to this report.