Dr. Tammy Penhollow has five suggestions to keep your immune system healthy through flu season and COVID-19. BOOSTIMMUNEimmune systemIMMUNITYSYSTEMvideoVITAMINvitamin immune systemvlogWAYSYouTubeRelated Posts Fix ‘qualified immunity’ to restore trust in police – San Diego Union-Tribune January 14, 2026 We Asked a Doctor If Vitamin D Can Really Support Your Immune System January 14, 2026 How To Boost Your Child’s Immune System January 14, 2026 Bile acid compounds produced by gut bacteria may influence early-life immune system January 14, 2026 Renee Good’s Family Will Hit Federal Immunity Wall if They Sue January 14, 2026 Gut Microbiome Lung Immunity Protects Against Pneumonia January 14, 2026