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Viruses ; 14(5)2022 05 13.
Article in English | MEDLINE | ID: covidwho-1903475

ABSTRACT

Currently, there are no evidence-based treatment options for long COVID-19, and it is known that SARS-CoV-2 can persist in part of the infected patients, especially those with immunosuppression. Since there is a robust secretion of SARS-CoV-2-specific highly-neutralizing IgA antibodies in breast milk, and because this immunoglobulin plays an essential role against respiratory virus infection in mucosa cells, being, in addition, more potent in neutralizing SARS-CoV-2 than IgG, here we report the clinical course of an NFκB-deficient patient chronically infected with the SARS-CoV-2 Gamma variant, who, after a non-full effective treatment with plasma infusion, received breast milk from a vaccinated mother by oral route as treatment for COVID-19. After such treatment, the symptoms improved, and the patient was systematically tested negative for SARS-CoV-2. Thus, we hypothesize that IgA and IgG secreted antibodies present in breast milk could be useful to treat persistent SARS-CoV-2 infection in immunodeficient patients.


Subject(s)
COVID-19 , SARS-CoV-2 , Antibodies, Viral , COVID-19/complications , Eating , Female , Humans , Immunoglobulin A , Immunoglobulin G , Milk, Human , NF-kappa B , RNA, Viral , SARS-CoV-2/genetics
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