Israeli research shows clear antibody drop 6 months after 2nd vaccine dose – The Times of Israel

New research from Israels Sheba Medical Center shows the waning of COVID-19 antibodies in the months following reception of 2 vaccine doses.
The study, released Wednesday in the New England Journal of Medicine, followed 5,000 medical workers at the healthcare facility who were under observation for a six-month period after getting the 2 vaccine doses. It observed a clear, considerable decline in both IgG and neutralizing antibodies over that duration.
Researchers reported a considerable drop over the very first three months, followed by a more moderate decrease over the next three months. Women usually established a much better initial antibody count than men and were hence rather better protected after a six-month period.

The study discovered that after six months, a young healthy ladys odds of losing her capability to neutralize the pathogen was 2.5% and a lady over 65% was at 6%; for men, it was 4% and 15% respectively.
For immunocompromised individuals, the chances were far even worse: 30% for women and 50% for males (over 65) and 18% for ladies and 24% for males (under 45).

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The drop in immunity versus COVID-19 some 6 months after vaccination has actually led Israel to embark on its existing booster campaign, indicated to strengthen protection half a year after the very first 2 doses. Health authorities think the drop in immunity allowed the considerable spread of the Delta version of the coronavirus in the population in recent months, resulting in Israels fourth wave which is now subsiding.

” We managed to develop a design that presents the chances of particular populations to have different antibody levels,” said scientist Dr. Gili Regev-Yochay. “Based on this model, in the future we can attempt to assess the chances of severe or mild illness … and figure out the required treatment.”
Strangely, the research found that antibody levels in overweight persons– who typically are more prone to extreme health problem– stayed higher than in others at the end of 6 months.
Regev-Yochay stated this information point would require to be analyzed even more, and did not necessarily indicate they were much better safeguarded.

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