Research into antibodies that UZ Brussel keeps with its employees shows that the antibodies from Covid-19 are often not sustainable. For the staff members who take part in the test in both phase 1 and now phase 3, it appears that half of them no longer have antibodies.
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The UZ Brussel study involved 2,662 of the approximately 3,800 hospital employees. Of these, 7.4 percent tested positive for Covid-19 antibodies in phase 1 (May 18 – June 12), 6.8 percent in phase 2 (July 13 – August 7) and 5.5 percent in phase 3 (5 – 30 October). That percentage is hardly higher than that of the general population.
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A few months
The research focuses specifically on the antibodies and how they remain or disappear in the body of the positive cases. But now it appears that these protective antibodies can disappear within a few months. Of the 185 participants with antibodies in phase 1, only half appeared to still have antibodies in phase 3.
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“The exact reason for this is not yet clear. It certainly shows the importance of continuing to follow all protective measures, even after an infection,” says Professor Sabine Allard, head of Internal Medicine clinic.
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Not necessarily antibodies
Those who test positive and are infected with Covid-19 do not necessarily produce antibodies afterwards. 10.2 percent of the participants who were positive in phase 1 were found to have no antibodies. In stages 2 and 3, 24.2 percent of the positive hospital employees had no antibodies. The reason for this also needs to be further investigated.
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Antibodies in corona patients disappear soon after healing: no hope of group immunity
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Is corona vaccine useful if antibodies disappear quickly from our blood? (+)
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