Originally Posted by
nonsense
I saw this figure a couple of days ago, based on the infection rate of 2.5 new cases per case, and wondered how they got this figure.
Of course the answer is that if (almost) everyone around you is susceptible to the virus, then on average you infect 2.5 of them, but if 60% of the people around you are immune due to prior infection, then you'll infect only one new case, and of course as soon as R drops below 1, the pandemic fizzles.
I thought I read an article saying that those who have been infected and recover can get the virus again. There is no immunity from re infection.
anyone else seen this as well or am I mistaken?