LadyL
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In reply to @otto too, after reading this article in John Hopkins magazine, I don't think they have increased immunity
When it comes to immunity, there's a very big difference between influenza and COVID-19. With influenza, because of previous infections and vaccinations, there's always a percentage of the population that is immune to infection—so they're protected and won't get the flu that year. And there's an even larger percentage of the population that has some immunity—not perfect immunity, so you'll still get infected, but enough so that your symptoms will be relatively mild.
With COVID-19, to our knowledge, there's no one in the human population who has any level of immunity to the virus. So the percentage of people who are susceptible to COVID-19 is essentially 100%, whereas with influenza the percentage is significantly less than 100%. That's one of the reasons why some of the stringent public health measures are being put into place. There really is nothing else that can prevent this virus from spreading in the population outside of public health interventions like social distancing. It's the lack of immunity in the population that is making people so susceptible.
COVID-19: IMMUNITY AND SEASONALITY
Johns Hopkins immunologist Andrew Pekosz discusses urgent questions about the coronavirus now infecting nearly 750,000 worldwide, including whether anyone is immune to the virus and whether it will ebb in warmer months
COVID-19: Immunity and seasonality
darn I was really hoping some of our elderly had a good luck charm in the form of some immunity