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by Israel Hayom / JNS.org
A medical worker gets her second vaccination injection against the coronavirus disease as Israel continues its national vaccination drive during a third national COVID-19 lockdown, at Tel Aviv Sourasky Medical Center (Ichilov Hospital) in Tel Aviv, Israel, January 10, 2021. Photo: REUTERS/ Ronen Zvulun.
JNS.org – More than 98 percent of people who received both doses of the COVID-19 vaccine have developed antibodies that neutralize the virus, according to the results of a serological study conducted by Tel Aviv’s Sheba Medical Center at Tel HaShomer.
The study, whose results were published Monday, tested subjects for antibodies a week after they received their second dose of the vaccine. Out of the 102 tests analyzed, researchers saw the level of antibodies jump by factors ranging from six to 20—even higher than the level of antibodies measured in recovered COVID-19 patients who had been seriously ill.
The serological study also showed that only two subjects had developed low levels of antibodies. Professor Gili Regev-Yochay, head of the medical center’s Infectious Disease Epidemiology Unit, who directed the study, said that one of the subjects was resistant to the vaccine, and the other was young and healthy.
Among Sheba’s staff, 7,106 have received at least one dose of the vaccine, and 4,484 have received both doses.
“The results of the study match the Pfizer trials and even exceed expectations,” Regev-Yochay said.
“I expect that the results of the study of the rest of the [medical center] workers will be similar. There is certainly a reason for optimism. I hope that we’ll see a drop in the number of new cases in the next two weeks,” she added.
Sheba continues to analyze the findings of other serological studies, and researchers are looking into whether there is a link between subjects’ age and the level of antibodies they develop. According to Regev-Yochay, the assumption is that anyone who has received both doses of the vaccine cannot infect others.
According to Regev-Yochay, “People who have received both doses of the vaccine have levels of antibodies ranging from six to 59. These are high values, and it’s encouraging and reasonable to assume that these people will not be carriers or contagious, although that is still not a direct conclusion.”
