Health Vitamin D & Flu: Boost Immunity This Winter, Experts Say by Dr Natalie Singh - Health Editor February 18, 2026 by Dr Natalie Singh - Health Editor February 18, 2026 Vitamin D and Respiratory Infections: A Protective Link? As winter descends, the importance of vitamin D for overall health comes into sharper focus. Recent research suggests a significant connection between … 0 FacebookTwitterPinterestEmail