40%-60% of us already immune to Covid
mark94
Arizona
An analysis of blood samples taken before Covid spread shows that up to 60% of the population already had some level of immunity to CoVid. That would explain why so many people who get Covid have no symptoms.
https://justthenews.com/politics-policy/…
https://justthenews.com/politics-policy/…
16 comments
https://blogs.sciencemag.org/pipeline/ar…
One possible explanation is that a flu bug has existed in a community recently that triggered a response that was also helpful with CoVid 19 when it later came around.
Again, who the fuck knows.
These other flu bugs, if they are the right kind, can act as a natural vaccine.
In the paper linked from the article, there was a section that covered the limits in the reported work.
"Limitations and future directions.
Caveats of this study include the sample size and the focus on non-hospitalized COVID-19 cases. Sample size was limited by expediency. The focus on non-hospitalized cases of COVID-19 is a strength, in that these donors had uncomplicated disease of moderate duration, and thus it was encouraging that substantial CD4+ T cell and antibody responses were detected in all cases, and CD8+ T cell responses in the majority of cases. Complementing these data with MP T cell data from acute patients and patients with complicated disease course will also be of clear value, as will studies on the longevity of SARS-CoV-2 immunological memory. Additionally, lack of detailed information on common cold history or matched blood samples pre-exposure to SARS-CoV-2 prevents conclusions regarding the abundance of crossreactive coronavirus T cells before exposure to SARS-CoV-2 and any potential protective efficacy of such cells. Finally, full epitope mapping in the future will add important detailed resolution of the human coronavirus-specific T cell responses. In sum, we measure SARS-CoV-2−specific CD4+ and CD8+ T cells responses in COVID-19 cases. Using multiple experimental approaches, SARS-CoV-2−specific CD4+ T cell and antibody responses were observed in all COVID-19 cases, and CD8+ T cell responses were observed in most. Importantly, pre-existing SARS-CoV-2−crossreactive T cell responses were observed in healthy donors, indicating some potential for pre-existing immunity in the human population. ORF mapping of T cell specificities revealed valuable targets for incorporation in candidate vaccine development, and revealed distinct specificity patterns between COVID-19 cases and unexposed healthy controls."
The biggest risk factors by demographics are age and obesity. All n' All I think we are going to come out of this with the realization that Coronavirus on the whole is less of a threat than Influenza. Sure COVID-19 has a higher mortality rate, however fewer people ever develop an adverse reaction to it as compared to Influenza.
> Some countries, like Japan, have very low infection rates. Other areas, like Milan, have been decimated.
I have to believe that some of this is caused by cultural differences. You don't have to be a world traveler to know that salutations in Japan are done in a vastly different way from Italy -- a difference directly related to transmission of the virus.