A large team of Swedish and Italian scientists (microbiologists, virologists, immunologists, and others) sought to better understand natural immunity associated with SARS-CoV-2 infection—that is COVID-19 illness. What is the longevity for immunity to COVID-19 following natural infection? The level of so-called durability of natural immunity and even vaccine-induced immunity is just now starting to be better understood. Led by the corresponding author Harold Marcotte with the Karolinska Institutet in Stockholm Sweden the research team monitored SARS-CoV-2 specific immune response in convalescent COVID-19 patients up to 15 months after symptoms started. In this study funded by the EU-ATAC Consortium, the Italian Ministry of Health, the Swedish Research Council, SciLifeLab, and KAW the investigators determined that based on their observations the data implies that antiviral specific immunity, particularly among member B cells in COVID-19 convalescent patients is long-lasting, however, some variants raise concerns. For example, the researchers suggest that the highly transmissible Delta variant may partially evade the neutralizing activity of plasma antibodies.
Swedes & Italians Lead Study Indicating Long Natural Immunity Associated with COVID-19 Although Some Risks with Delta & Other Variants