The first recipient of a new breast cancer vaccine has been revealed to the public.
Jennifer Davis, MD, of Ohio, received the innovative vaccine, developed by the Cleveland Clinic, in October 2021.
She had previously battled triple negative breast cancer, and went into remission in 2018. She was selected for the trial because there was a high chance the cancer would come back.
The shot she received is among hundreds of experimental cancer vaccines and drugs in early trials.
One cancer vaccine made by Moderna for patients recovering from advanced melanoma was awarded “breakthrough treatment” status by health chiefs last month, paving the way for fast-track approval.

Jennifer was told she had triple negative breast cancer during a typical day at work in 2018

Ms. Davis receives the third dose of her breast cancer vaccine from coordinating research nurse Donna Latch
Ms. Davis, a nurse from Lisbon, Ohio, about 60 miles northwest of Pittsburgh, found a lump in her breast in February 2018.
Her first biopsy — a test done on tissue taken from a live person to check for disease — found no evidence of cancer.
But the tumor grew over the next few months and Davis underwent another biopsy after an ultrasound showed abnormalities.
A week later, she was diagnosed with triple-negative breast cancer and underwent several rounds of chemotherapy and radiation, as well as a double mastectomy — the removal of both breasts.
Triple negative breast cancer makes up about 10-15 percent of all breast cancers.
It’s called a triple negative because cancer cells don’t have receptors for estrogen or progesterone, and they don’t make any or much of a protein called HER2.
Approximately 40 percent of people with stage I through stage III triple-negative breast cancer will return after treatment.
About 91 percent of all women diagnosed with the disease are still alive five years after diagnosis. However, if the cancer has spread, the five-year survival rate is 12 percent.
In general, triple negative breast cancer has a worse survival and cause-specific survival than non-triple negative breast cancer.
During follow-up appointments, I learned about the Cleveland Clinic’s breast cancer vaccine clinical trial.
The injection works by targeting a lactation protein called α-lactalbumin, which is no longer present after lactation in noncancerous tissues but is present in the majority of triple-negative breast cancers. Protein plays a major role in milk production.
If breast cancer occurs, the vaccine stimulates the immune system to attack the tumor and prevent its growth.
Ms. Davis is part of a Phase 1a study, which includes patients who have completed treatment for early-stage triple-negative breast cancer in the past three years.
These people should be free of tumors but are at high risk of recurrence.
She was given three doses of the vaccine, two weeks apart. Her last shot was in November 2021, and she didn’t experience any major side effects.

She underwent several rounds of chemotherapy and radiation, as well as a double mastectomy

Jennifer with her tight-knit family before her treatment for breast cancer
“Triple-negative breast cancer is the form of the disease for which we have the least effective treatments,” said Dr. George Thomas Bode, a breast oncologist and principal investigator of the Cleveland Clinic’s breast cancer vaccine trial.
In the long term, we hope this will be a true preventive vaccine given to individuals who do not have cancer to prevent them from developing this highly aggressive disease.
‘There is no medicine I take to make sure I don’t get a recurrence,’ said Ms Davis.
With every ache and pain, your mind goes to the worst case scenario. So I was really excited when I heard about the vaccine.
In February 2023, Cleveland Clinic began a Phase 1B clinical trial.
This time, it focuses on individuals without cancer who are at high risk of developing breast cancer and who have undergone a prophylactic mastectomy to reduce their risk.
Davis, now 46, is celebrating her fifth year in remission.
Another cancer vaccine is Moderna for advanced melanoma.
It works by harnessing mRNA technology that uses bits of genetic code from patients’ tumors to teach the body to fight cancer.
The vaccine is given to people after surgery to prevent the tumor from returning, and it is tailored to each patient, meaning no two shots will be the same.
Merck and Moderna said they plan to start a Phase III study in the treatment this year, when it will be tested on thousands of patients.
They will also “rapidly scale up” to look at other cancers, including non-small cell lung cancer.
The federal government has a major initiative to reduce cancer deaths launched last year, called the Cancer Moonshot.
It follows more investment in cancer screening, prevention and treatment in recent years.