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Are we at the beginning of the end of COVID-19? The tricky road to herd immunity, explained. – The Philadelphia Inquirer

Jan 8, 2021 | Uncategorized | 0 comments

COVID-19 is far less transmissible. In a “naive” population with no prior exposure and no precautions in place, each infected person spreads the virus to an average of three others, epidemiologists calculated early in the pandemic. Social distancing, masks, and other safeguards can drive that number down so long as everyone is on board, but a key point to remember is that word average. Some people with COVID-19 are super-spreaders — passing on the disease to far more than three others, whether because they are careless, or unaware they’re infected, or both.