Why Colds Follow a Predictable Script

What this episode covers

Ever wonder why a cold always starts with sneezing before the runny nose sets in? It's not random — your immune system runs a choreographed three-act play. In this episode, we break down the elegant sequence: histamine triggers sneezing to expel the virus within hours, cytokines cause aches and fever as the innate immune system mobilizes, and finally, plasma leakage and mucus production flood the battlefield to flush out debris. We also tackle persistent myths: green mucus doesn't mean bacterial infection (it's neutrophil bleach), and why some colds last three days while others drag on for three weeks (it depends on whether your immune system has seen that rhinovirus serotype before). Plus: why your nose is the perfect temperature for rhinovirus, and how fever speeds up your defenses by 20% per degree Celsius.

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