People with Covid-19 can infect others 2-3 days before symptoms appear. Contagiousness started 2-3 days before symptoms, and peaks at 0-7 days before first signs of cough or fever. 44% people get infected by people with no visible signs of illness. On average, it takes 7 days to develop symptoms after getting infected. Many infections cannot be linked to known Covid-19 cases or travel to hotspots, which indicates asymptomatic transmission. Watch the full video for more details.
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