Therefore, previous infection produces memory B cells that “patrol the blood for reinfection, while bone marrow plasma cells (BMPCs) hide away in bones, trickling out antibodies for decades”
When required, in addition to the strong T-cell memory that most or all vaccinated persons probably lack. Therefore, it is not unexpected that an in-vitro investigation conducted.
In Singapore early in the pandemic indicated that SARS-1-infected individuals who never ever acquired COVID-19 had protection against SARS-CoV-2 that lasted till 17 years later. Cleveland Clinic, 19 June 2021
Even while some of the 1,359 previously infected healthcare professionals in the Cleveland Clinic system.
Were exposed to more COVID-positive patients than the general population, not a single one of them contracted the virus again ten months into the pandemic.
4) Cell Medicine, July 14, 2021, Fred Hutchinson Cancer Research Centre, Seattle/Emory University, Washington
