“Each hourly increase in flight duration increased the incidence rate by 1.53-fold.”
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Here's what the science says:
➡️ Most people are infectious for ~10 days
➡️ ~80% of people test positive for 5 days after symptom onset
➡️ Only ~30% of people who test positive have a fever
➡️ Presence of symptoms is an unreliable indicator of infectiousness