Jay on Instagram: "Uusi💉 poodanum.. konjam thirumbunga In the 1960s, the world witnessed one of the most ambitious medical innovations ever attempted: the needle-free jet injector, a futuristic-looking “vaccine gun” designed to blast medicine through the skin using a high-pressure jet of liquid instead of a needle. At a time when disposable syringes were rare and mass vaccination campaigns were urgently needed, this device became a global hero. It could immunize hundreds—sometimes thousands—of