Other Covid-19 vax brands just as good for breastfeeding vaccination, Argentinian study finds
Argentinian researchers have conducted studies that allegedly prove that women vaccinated with Sinopharm, AstraZeneca and Sputnik V transmit immunity against COVID-19 to their children through breast milk.
Scientists from the Leloir Institute Foundation (FIL) said their findings were “the first scientific evidence of the response of nursing mothers to these types of vaccines, which is of paramount importance because there is no no inoculants available for babies under 6 months”.
The work assessed anti-SARS-CoV-2 IgG and IgA antibody levels in serum and milk samples from 208 lactating women with or without prior SARS-CoV-2 infection.
Diego Ojeda, one of the scientists behind the investigation, said that “so far, only passive immunity transfer has been studied in mothers vaccinated with messenger RNA platforms (Pfizer and Moderna) and there was no scientific evidence confirming the transfer of antibodies with virus or inactivated. vector platforms widely used in Argentina, such as AstraZeneca, Sputnik V and Sinopharm vaccines. That’s what we did.
“The study showed that the vaccines available in Argentina generate a humoral immune response that produces IgG and IgA antibodies,” Ojeda added.
“Another finding was that the IgA antibody response to vaccines was similar in milk and plasma, regardless of the platform received,” he also pointed out.
“IgA antibodies secreted by the mammary glands have the ability to neutralize pathogens to which nursing mothers have been exposed or immunized through vaccines. Our study was to detect and quantify these SARS-COV-2 specific IgA antibodies in breast milk,” Ojeda explained.
The study was undertaken with the help of the Human Milk Bank of the Ramón Sardá Public Hospital in Buenos Aires, which in February 2021, when nursing mothers were included in the vaccination campaign against COVID-19, began recruiting volunteers from its donor registry. Some of the women had a previous SARS-CoV-2 infection and were grouped as convalescents, while those who had not become ill were in the control group.
The mothers in the study were taught how to collect the milk samples at home and then delivered them to the University of Buenos Aires School of Medicine, where they also underwent blood tests.