This video covers section 3.3 from your assigned reading (see Be sure you read that first! Try taking notes from it before watching this video and use the information here to clarify what you read. CoronavirusCOVID-19COVID19COVID19 immune systemimmune systemIMMUNITYLecturesummaryvideoVITAMINvlogYouTubeRelated Posts COVID’s New Variant Is Spreading Faster Than Expected April 16, 2026 These Aren’t Just Hormone Problems April 16, 2026 New COVID Variant ‘Cicada’ Spreading Across U.S. | Seniors at Highest Risk April 15, 2026 Persistent immune activation and MS explosion #diseaseprevention April 13, 2026 Cicada COVID Variant Spreading in U.S. | What Doctors Want You to Know Now April 12, 2026 New COVID Variant Affecting Kids April 7, 2026