COVID-specific antibodies remain in breast milk for up to 10 months after infection. health News


New York: In lactating women, COVID infection produces virus neutralizing antibodies that remain in their milk for up to 10 months, a new study has found.

The study, led by the Icahn School of Medicine at Mount Sinai Hospital in New York, showed that antibodies in breast milk — secretory immunoglobulin A — are distinct from immunoglobulin G (IgG) antibodies that are found in human blood and are transmitted by COVID-19. are triggered. Vaccinations, the Guardian reported.

The study was presented recently at the 15th Global Breastfeeding and Breastfeeding Symposium.

Dr. Rebecca Powell of Icahn’s Department of Medicine, Division, said, “About 10 percent of infants requiring advanced care will experience COVID-19 illness. One possible mechanism to protect this population is through the use of an already infected mother. Passive immunity can be provided through milk.” of infectious diseases.

Secretory immunoglobulin A (IgA) sticks to the lining of babies’ respiratory and intestinal tracts, and helps prevent viruses and bacteria from entering their bodies.

The report said that Powell believes that these antibodies, extracted from breast milk, may also be beneficial for adults with severe COVID-19.

“It can be an incredible therapy, because secretory IgA occurs in these mucosal areas, such as the lining of the respiratory tract, and it survives and works very well there,” Powell was quoted as saying.

For the study, the team took breast milk samples from 75 women who had recovered from COVID-19 and found that 88 percent had IgA antibodies. In most cases, these were able to stop the infection.

They also found that the women continued to secrete these antibodies for 10 months.

In addition, Powell’s team also examined links to COVID-specific antibodies in breast milk in 50 women after vaccination with Pfizer, Moderna, or Johnson & Johnson (J&J) jabs, the report reported. Having said.

Of all the women who injected Moderna vaccine and those who received the Pfizer vaccine, 87 percent had coronavirus-specific IgG antibodies in the milk, while 71 percent and 51 percent had virus-specific IgA antibodies, respectively. For the J&K vaccine, only 38 per cent of the women had IgG antibodies and 23 per cent had IgA antibodies against the coronavirus in the milk.

“We know that the level of antibodies produced by RNA vaccines is much higher than in other vaccines. You don’t necessarily need that many antibodies to protect you from infection, but the effect of milk really depends on That you have too many antibodies. Blood that’s transferring to your milk. Because there’s a lower level induced by the J&J vaccine (a viral vector vaccine), that’s probably why there’s a very low level in the milk,” says Powell was cited.

The team is now examining the antibody response in breast milk triggered by the AstraZeneca vaccine.

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