He noted that Russia is following a strategy that is the need for a third vaccination against coronavirus.
According to Logunov, the third vaccination effectively restores the decrease in immunity by the sixth to eighth month.
“In principle, it is possible and necessary to consider options, if, for example, the delta strain is very stable and will never change, you can consider options for changing the strains,” the specialist said.
Logunov added that at the moment the effectiveness of Sputnik V against coronavirus is higher than the requirements set by the WHO.
“Therefore, there are no such tough indications for changing vaccine strains yet.
And you can see that both Pfizer and Moderna have not changed the vaccine drug yet.
But in any case, you need to be prepared, ”he said.
According to him, the center.
Gamalei "is not just preparing for this morally."
Logunov noted that "all vaccine strains have been obtained."
“They have been tested for their effectiveness and safety in animals.
Control batches have been released, which, if necessary, can always be launched into some limited clinical trials, and then into practice when making a decision, a regulatory decision that a strain change is necessary, ”said Logunov.
Earlier, the director of the Gamaleya Research Center for Epidemiology and Microbiology, Alexander Gintsburg, said that 300 units of antibodies fully protect against the delta strain.