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10.1007/s15010-021-01651-4

http://scihub22266oqcxt.onion/10.1007/s15010-021-01651-4
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suck abstract from ncbi


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pmid34213733      Infection 2021 ; 49 (5): 1045-1048
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  • IgG antibody response against nucleocapsid and spike protein post-SARS-CoV-2 infection #MMPMID34213733
  • Choudhary HR; Parai D; Dash GC; Peter A; Sahoo SK; Pattnaik M; Rout UK; Nanda RR; Pati S; Bhattacharya D
  • Infection 2021[Oct]; 49 (5): 1045-1048 PMID34213733show ga
  • OBJECTIVES: Coronavirus disease-19 (COVID-19) pandemic became the greatest public health challenge globally. Study of dynamicity and durability of naturally developed antibodies against SARS-CoV-2 are of great importance from an epidemiological viewpoint. METHODS: In this observational cohort study, we have followed up the 76 individuals who tested positive for SARS-CoV-2 infection by real-time reverse transcriptase-polymerase chain reaction (RT-qPCR) for 16 weeks (post-enrolment) to record the periodic changes in titre, concentration, clinical growth and persistence of naturally developed SARS-CoV-2 antibodies. We collected serum samples from these individuals for 16 weeks with a frequency of weekly and fortnightly during each follow-up and tested them in two CLIA-based platforms (Abbott Architect i1000SR and Roche Cobas e411) for testing SARS-CoV-2 antibodies both qualitatively and quantitatively. RESULTS: We recorded the antibody magnitude of these individuals 10 times between September 2020 and February 2021. We found a waning of antibodies against nucleocapsid antigen protein but not a complete disappearance by the end of 16 weeks. Out of 76 cases, 30 cases (39.47%) became seronegative in qualitative assay, although all the sera samples (100%) remained positive when tested in quantitative assay. CONCLUSION: The lower persistence of anti-nucleocapsid SARS-CoV-2 antibody may not be the exact phenomenon as those cases were still seropositive against spike protein and help in neutralising the virus.
  • |*COVID-19[MESH]
  • |*Spike Glycoprotein, Coronavirus[MESH]
  • |Antibodies, Viral[MESH]
  • |Antibody Formation[MESH]
  • |Humans[MESH]
  • |Immunoglobulin G[MESH]
  • |Nucleocapsid[MESH]
  • |SARS-CoV-2[MESH]


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