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A new Bill Gates-funded injection could offer years of birth control in a single shot. Would you get one?The groundbreaking injectable, which was developed by MIT engineers and funded by the Gates Foundation, could redefine long-term contraception and chronic disease treatment.This new method uses tiny drug crystals suspended in a biocompatible solvent, forming a compact depot under the skin that gradually releases medication over months—or even years—with just one injection.Unlike existing long-acting options, this formulation is easy to inject using a thin needle, offering a less invasive and more accessible solution for patients worldwide, especially in regions with limited healthcare infrastructure.Initially designed to expand birth control options, the injectable has potential applications far beyond contraception. The technology could be adapted for long-term delivery of treatments for HIV, tuberculosis, and neuropsychiatric disorders. In animal studies, over 85% of the drug remained three months post-injection, suggesting a much longer release timeline. The depot can also be removed if needed, offering flexibility and safety. With further human trials on the horizon, this innovation marks a major step toward personalized, durable, and convenient drug delivery.