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Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Clin+Transl+Immunology 2021 ; 10 (7): e1306 Nephropedia Template TP
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SARS-CoV-2-specific humoral and cellular immunity persists through 9 months irrespective of COVID-19 severity at hospitalisation #MMPMID34257967
Sandberg JT; Varnaite R; Christ W; Chen P; Muvva JR; Maleki KT; Garcia M; Dzidic M; Folkesson E; Skagerberg M; Ahlen G; Frelin L; Sallberg M; Eriksson LI; Rooyackers O; Sonnerborg A; Buggert M; Bjorkstrom NK; Aleman S; Stralin K; Klingstrom J; Ljunggren HG; Blom K; Gredmark-Russ S
Clin Transl Immunology 2021[]; 10 (7): e1306 PMID34257967show ga
OBJECTIVES: Humoral and cellular immunity to SARS-CoV-2 following COVID-19 will likely contribute to protection from reinfection or severe disease. It is therefore important to characterise the initiation and persistence of adaptive immunity to SARS-CoV-2 amidst the ongoing pandemic. METHODS: Here, we conducted a longitudinal study on hospitalised moderate and severe COVID-19 patients from the acute phase of disease into convalescence at 5 and 9 months post-symptom onset. Utilising flow cytometry, serological assays as well as B cell and T cell FluoroSpot assays, we assessed the magnitude and specificity of humoral and cellular immune responses during and after human SARS-CoV-2 infection. RESULTS: During acute COVID-19, we observed an increase in germinal centre activity, a substantial expansion of antibody-secreting cells and the generation of SARS-CoV-2-neutralising antibodies. Despite gradually decreasing antibody levels, we show persistent, neutralising antibody titres as well as robust specific memory B cell responses and polyfunctional T cell responses at 5 and 9 months after symptom onset in both moderate and severe COVID-19 patients. CONCLUSION: Our findings describe the initiation and, importantly, persistence of cellular and humoral SARS-CoV-2-specific immunological memory in hospitalised COVID-19 patients long after recovery, likely contributing towards protection against reinfection.