Daylight saving time kicks in this weekend for New South Wales, Victoria, South Australia, Tasmania and the Australian Capital Territory. Time shifts can be controversial, and in recent years there's been research into the effects on our health. One study has looked into the incidence of strokes and obesity.  Also, why experts want to change the name of polycystic ovary syndrome (PCOS) and we take a tour of the Australian Centre for Disease Preparedness.  References: Draft National Health and Medical Research Strategy - NHMRC Safety concerns over imported melatonin products - TGA Retraction: Apple cider vinegar for weight management in lebanese adolescents and young adults with overweight and obesity: a randomised, double-blind, placebo-controlled study Circadian-informed modeling predicts regional variation in obesity and stroke outcomes under different permanent US time policies Polycystic ovary syndrome perspectives from patients and health professionals on clinical features, current name, and renaming: a longitudinal international online survey - the Lancet Inside the Australian lab where scientists study bird flu and other emerging disease threats - ABC News Dynamic Balnce for Life A Judo-Based Exercise Program to Reduce Falls and Frailty Risk in Community-Dwelling Older Adults: A Feasibility Study