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SS Knowledge TV on Instagram: "The Needle-Free Vaccine. This shocking 1967 invention was supposed to end the fear of needles forever! Scientists created a Jet Injector — a device that could inject vaccines without a needle, using high-pressure liquid jets that penetrated the skin directly. It was widely used during mass vaccination campaigns because it was fast, cheap, and efficient. But soon doctors discovered a terrifying truth — the same nozzle was being reused for multiple people, which mean
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SS Knowledge TV on Instagram: "The Needle-Free Vaccine. This sh…
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knowledge motivation and facts | In 1967, doctors introduced a needle-free injection method known as the jet injector. Instead of piercing the skin with a needle, it used a... | Instagram
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