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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9121106PMC
http://dx.doi.org/10.1136/rmdopen-2022-002323DOI Listing

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Introduction: Casirivimab/imdevimab (CAS/IMD) comprises two monoclonal antibodies that neutralize SARS-CoV-2. Pregnant individuals were excluded from initial trials, limiting safety data.

Methods: The COVID-19 International Drug Pregnancy Registry enrolled 53 pregnant women treated with CAS/IMD, with 34 live births.

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Article Synopsis
  • The study investigates how antiviral monoclonal antibodies (mAbs), particularly casirivimab and imdevimab (CAS+IMD), affect immune responses when individuals are vaccinated against SARS-CoV-2 after receiving mAb treatment.
  • It was found that the presence of CAS+IMD during vaccination reduced the effectiveness of the vaccine in generating neutralizing antibodies, though other immune responses remained intact.
  • This reduction in antibody production is linked to "epitope masking," but can be reversed with booster shots, and influences the immune response differently in those who had not yet begun their natural immunity when treated with mAbs.
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