How Could Immunity Against SARS-Cov-2 Last Up To More Than Six Months?

How Could Immunity Against SARS-Cov-2 Last Up To More Than Six Months?

For improving the diagnostics process, it is crucial to understand the response of immune memory cells to SARS-CoV-2 and vaccines. This assessment is likely to help the future course of the pandemic. Several compartments of circulating immune memory to SARS-CoV-2 study revealed that the spike in IgG was comparatively stable over 6+ months. By studying the response of antibody, CD4+ T cell, memory B cell, and CD8+ T cell memory to SARS-CoV-2 in a combined manner, experts observed that each component of SARS-CoV-2 immune memory revealed diverse kinetics.

The memory cells: B cells are the basis for durable Immunological memory that provides protective immunity after infections or vaccinations. The duration of immunological memory after severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection and COVID-19 is uncertain. The Protective Immunity memory consists of antibodies, memory B cells, memory CD8+ T, and memory CD4+ T cells. It is difficult to understand the kinetics of human memory against COVID-19 and to assess the likely upcoming course of the COVID-19 pandemic.

The diverse types of immune memory each had different kinetics, resulting in intricate interrelationships between the plenty of T cell, B cell, and antibody immune memory with time. The heterogeneity in memory cells to SARS-CoV-2 was detected in various cases. Overall, the Immune checkpoint assays help in checking the diversity in the immune memory cells  to SARS-CoV-2 for different people.

CONCLUSION

The four major memory types- antibodies, memory B cells, memory CD8+ T, and memory CD4+ T cells generate substantial immune memory after COVID-19. Around 95 percent of subjects retained immune memory for about six months even after infection. Therefore, lab tests for SARS-CoV-2 antibodies do not reveal the productivity and robustness of immune memory to SARS-CoV-2. This work expands our knowledge about the immune memory response in humans. These results have various indications for protective immunity against SARS-CoV-2 and current COVID-19.

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  • 03/12/2021
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