The head of the Gamaleya Research Center for Epidemiology and Microbiology, Alexander Gintsburg, said that all children aged 6-11 in Moscow had already been ill with coronavirus, so the protocol for clinical trials of the Sputnik M vaccine needs to be changed, Interfax reports.

"There is a problem. When we started the first pre-screening of this age group of children, there were simply no children negative for antibodies to COVID-19 in this age group. Because this is now the background in this population of children in terms of antibodies. It is impossible to find those who have not experienced the coronavirus. There were ideas to look for them somewhere far away from Moscow, from big cities, but, you know, organizationally it is simply unrealistic, ”Gintsburg believes.

He clarified what needs to be done to continue testing.

“Therefore, we are now urgently submitting an amendment to our protocol, I hope we will quickly be given permission that the lower limit for antibodies will not be zero, but at least 100 international units - BAU. This is a low figure, but nonetheless,” Gunzburg said.

According to him, the study will take place in a timely manner.

Earlier, Alexander Gunzburg revealed the details of the nasal vaccine trial.

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