There has been an interesting development in ongoing research on COVID-19. From a piece at SciTechDaily:
A scientific breakthrough against COVID-19 has been realized by Tel Aviv University. A team of scientists from the university has demonstrated that antibodies isolated from the immune system of recovered COVID-19 patients are effective in neutralizing all known strains of the virus. This includes the Delta and the Omicron variants. This discovery may eliminate the need for repeated booster vaccinations and strengthen the immune system of populations at risk, according to the researchers.
Dr. Natalia Freund and doctoral students Michael Mor and Ruofan Lee of the Department of Clinical Microbiology and Immunology at the Sackler Faculty of Medicine led the research. The study was conducted in collaboration with Dr. Ben Croker of the University of California San Diego (UCSD). Prof. Ye Xiang of Tsinghua University in Beijing as well as Prof. Meital Gal-Tanamy and Dr. Moshe Dessau of Bar-Ilan University also took part in the study. The study was published on August 5 in the Nature journal Communications Biology.
The current study is a continuation of a preliminary study that was conducted in October 2020, at the height of the COVID-19 crisis. At that time, Dr. Freund and her colleagues sequenced all the B immune system cells from the blood of people in Israel who had recovered from the original COVID strain. They isolated nine antibodies that the patients produced. The scientists have now found that some of these antibodies are exceptionally effective in neutralizing the new coronavirus variants, Delta and Omicron.
Dr. Freund: “In the previous study, we showed that the various antibodies that are formed in response to infection with the original virus are directed against different sites of the virus. The most effective antibodies were those that bound to the virus’s ‘spike’ protein, in the same place where the spike binds to the cellular receptor ACE2. Of course, we were not the only ones to isolate these antibodies, and the global health system made extensive use of them until the arrival of the different variants of the coronavirus, which in fact rendered most of those antibodies useless.
“In the current study, we proved that two other antibodies, TAU-1109 and TAU-2310, which bind the viral spike protein in a different area from the region where most of the antibodies were concentrated until now (and were, therefore, less effective in neutralizing the original strain) are actually very effective in neutralizing the Delta and Omicron variants. According to our findings, the effectiveness of the first antibody, TAU-1109, in neutralizing the Omicron strain is 92%, and in neutralizing the Delta strain, 90%. The second antibody, TAU-2310, neutralizes the Omicron variant with an efficacy of 84%, and the Delta variant with an efficacy of 97%.â€
If this discovery can be capitalized on, it might increase the likelihood of actually stamping out COVID-19, the much-touted “herd resistance”. Present vaccines are clearly not effective enough and the need for repeated vaccinations reduces the likelihood of people actually seeking them.







