As the Southern Hemisphere's winter reaches its final, wearying stretch, many Australians find themselves not merely cold but quietly depleted — their bodies having spent months converting diminished sunlight into something like endurance. Vitamin D deficiency, flu vulnerability, and the lingering presence of COVID-19 and RSV are not separate misfortunes but a single seasonal reckoning. The wisdom available to us now is not to wait for spring to begin recovering, but to use these final weeks as a threshold — a moment to replenish, protect, and prepare.