“In the West, in particular in Israel, it is impossible to sign the participants of any tests, that is, a person has every right to check everything he wants.

Therefore, of course, they explain to the person who takes part in the tests that this is undesirable, they ask him not to do this, ”he told RIA Novosti.

The fact that the patient knows or not whether he received a placebo can influence the subjective symptoms that he fills in the diaries.

The main thing is that the information about whether the subject received a placebo or an active vaccine does not get to the observing doctor, the scientist believes.

“When we give the vaccine, there is always a control group that receives a placebo.

They compare the symptoms and incidence of both groups.

At the same time, neither the participant nor the researcher should know what the person received, ”said Berkun.

Earlier, Anch Baranova, professor at the School of Systems Biology at George Mason University, said that only the first manufacturers could carry out full clinical trials of their coronavirus vaccines.