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American Focus > Blog > Tech and Science > New Kind of Dental Floss Could Replace Vaccine Needles, Study Finds : ScienceAlert
Tech and Science

New Kind of Dental Floss Could Replace Vaccine Needles, Study Finds : ScienceAlert

Last updated: July 28, 2025 2:30 am
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New Kind of Dental Floss Could Replace Vaccine Needles, Study Finds : ScienceAlert
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A Fear of Needles Overcome: Researchers Develop Needle-Free Vaccine Delivery System Using Dental Floss

A fear of needles is a common reason for avoiding vaccines, even among many adults. However, researchers have now devised a clever alternative using dental floss to administer vaccines effectively.

The team from Texas Tech University identified the junctional epithelium (JE) as a potential entry point for vaccines in the mouth, located where the gums meet the teeth. This area is naturally leaky, allowing immune cells to defend against bacterial attacks, making it a suitable target for vaccines.

The researchers hypothesized that the leakiness of the JE could facilitate the entry of vaccine antigens, triggering an adaptive immune response due to the abundance of immune cells in this microenvironment.

By coating dental floss with different types of vaccines and testing them on mice, the researchers found promising results. Strong immune responses were observed in the mice’s mouths and bodies, with the floss vaccine effectively protecting against a subsequent flu infection.

Human volunteers were also tested using dye instead of a vaccine, showing that flossing could deliver the dye to the JE target effectively. This method could potentially revolutionize vaccine delivery, offering a simple and needle-free strategy that enhances immune activation.

Aside from being less intimidating for needle-phobic individuals, floss-based vaccines would be easier to transport and store. They could be self-administered without the need for healthcare professionals, even allowing for postal delivery during pandemics like COVID-19.

While previous attempts at oral vaccine delivery have faced challenges in tissue penetration, the floss-based approach shows promise for overcoming these limitations. The potential benefits of this innovative method are substantial, offering a new avenue for vaccine delivery.

See also  Birds' nests in Amsterdam are made up of plastic from 30 years ago

The research, published in Nature Biomedical Engineering, highlights the need for alternative vaccine delivery methods to address issues associated with injectable vaccines.

TAGGED:DentalfindsflosskindNeedlesReplaceScienceAlertStudyvaccine
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