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when cold spreads
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When Is a Cold Contagious? The Science Behind Viral Spread
What makes this even more perplexing is how contagion aligns with viral load—peaking not at symptom onset, but during the first 2–3 days of illness, when...
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What makes this even more perplexing is how contagion aligns with viral load—peaking not at symptom onset, but during the first 2–3 days of illness, when...