According to Chumakov, who gave an interview to the YouTube channel “Advise, doctor!”, With the use of such drugs, one must be careful, since “a virus or antigen can enter the brain.”

This case included nasal vaccines against COVID-19.

At the same time, Anatoly Altshtein, professor of virology, chief researcher at the Gamaleya National Research Center for Epidemiology and Microbiology, did not agree with the position of his colleague.

“The virus that is contained in this vaccine is able to infect a cell, but does not give offspring.

And the vaccine after the introduction into the brain will not work.

There is simply nothing to go.

I'm afraid Konstantin Mikhailovich is somewhat mistaken here, ”he told RBC.

Also, Altshein's point of view was supported by Larisa Popovich, Director of the Institute of Economics and Healthcare of the National Research University Higher School of Economics.

“It’s even good that it penetrates through other channels - this is the first echelon of the immune system, it will be strengthened and protected.

Together with Sputnik, this can become a serious element of protection, ”she said.

Earlier, Academician of the Russian Academy of Sciences Alexander Gintsburg, head of the Gamaleya Center of the Ministry of Health of Russia Alexander Gintsburg allowed a reduction in the timing of clinical trials of Sputnik V in the form of a spray.

He stated that the nasal vaccine against COVID-19 will be two-component.