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" ... 2. The infectability rate is not a constant, or a rate of greater than 1 would mean everyone in the world would catch the disease. For the flu, good weather brings a drop in the rate. For the more serious coronavirus, quarantines are the main tool used by health authorities lower the infection rate. ... "
" ... The release of this data is a positive development. For months, the impact of vaccines on the pandemic has been mostly speculative. Nobody knew how mass vaccination might affect infectability or transmissibility. This data is the first of many, and we await data from similar studies. ... "