Researchers in the Netherlands are developing the 'Bubble Gun' which uses laser technology to deliver 'virtually painless injections'.
Explained: Needle-free system to administer Zydus Cadila's ZyCoV-D vaccine
Needles 【良好品】 6200円
Immunization without needles
Needles 【良好品】 6200円
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New vaccination technologies that make needles redundant - The Lancet Infectious Diseases
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A Puff of Air Could Deliver Your Next Vaccine Headline Science - American Chemical Society