В статье довольно популярно изложено как работает иммунитет, ктсати.
The SARS-CoV-2 virus disrupts the memory-making process by preventing the development of the T cells that help B cells form germinal centers. If the body cannot form germinal centers, it cannot create the memory B cells that remember how to fight the disease.
We believe that the culprit is likely the COVID-19 cytokine storms—large influxes of immune signaling molecules that can disrupt the immune system’s normal processes.
As a result, if a person is infected for a second time, the immune system may not remember how best to fight it, leading to “immune amnesia.” This unusual phenomenon vastly reduces the chances of developing robust and long-lived herd immunity after natural infection.