Picture a swarm of microscopic warriors – virus-like nanofibres – storming a breast tumour like a fortress, armed with oxygen and laser precision. Developed by a brilliant team at CUHK, these tiny, virus-like fibres that can find breast tumours, produce oxygen, and help destroy cancer with light. In mouse studies, they made tumours shrink quickly, even in areas where current treatments often fail. This breakthrough could defy the limit of traditional therapies and spark a wildfire of hope for more targeted, less harmful cancer therapies.