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Many research papers as well as #RKI, Germany assert average start of symptoms for #COVID19 around 5th-6th day of infection and peak of infectiousness between 2 days before to 1 day after onset of symptoms.. 🧵1/. #2ndlevel #contacttracing #coronavirus
As thumbrule it takes 10-12 days for #lockdown to impact the spread of #COVID19, so duration between infection till confirmation is on avg. 10 days. This is reasonable as people would wait 1-2 days with symptoms, book a test appointment and get the results so 6+2+1+1=10 days 🧵2/
So if Person A gets infected with #COVID19 today, he will be reported as a confirmed case after 10 days. But he might have infected person B after 4 days. Person B might have infected person C after 4+4 = 8 days from today, or 2 days before person A is reported. 🧵3/
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