The Corona-pandemic keeps the world in breath. More than 12 million people were infected with the novel Coronavirus, 198.546 of them in Germany. The United States reported almost daily new record numbers.

Decline in the number of Corona-anti-body dampens hope for vaccine

New studies of recovering Covid-19-patients dampen the hope for a long-lasting immunity, and thus a long effectiveness of a possible vaccine. Blood tests of the first Corona-patients in Germany were treated at the end of January in Munich, clinic Schwabing, showed a significant decrease in the number of so-called neutralizing antibodies in the blood, reported Clemens Wendtner, chief doctor of the local clinic for infectious diseases.

"In four of the nine patients, we see a decline in neutralizing antibodies in a very special Test only in a high-security laboratory to be made kann", Wendtner said. "The extent of this impact for the long-term immunity and vaccination strategies, is currently speculative, but must be critically observed." It indicates, however, that after made disease a Neuansteckung is possible.

This needs to be monitored, said Wendtner. For the long-term immunity-associated antibodies measured immunity is in addition to the so-called B-cell also called T-cell immunity is relevant. If patients lose neutralizing antibodies, could this give any protection. T-lymphocytes are able to kill virus-infected cells in a targeted manner, if you have studied your opponents even know.

Wendtners insights in the experiences of other scientists and results of the study. Chinese researchers reported in the journal "Nature Medicine", the antibodies were received after two months, especially in patients with symptom-free course a strong back, but also in actually ill patients, the values were significantly. Patients with little symptoms had also developed fewer antibodies and, therefore, a weaker immune response.

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