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Raw History Clips on Instagram: "Needle-free injections first appeared in the 1930s as an alternative to traditional needle syringes, which had already been in use since the mid-19th century. These devices used high-pressure jets to push medicine through the skin without a needle. By the 1950s to 1970s, jet injectors became popular in military programs and mass vaccination campaigns, as they allowed faster inoculation of large groups without changing needles. However, by the late 1990s, many nee