"When XBB appeared.1.5 is a variant of Omicron (kraken), - it was in January 2023, - Sputnik stopped protecting just completely," he said.
Ginzburg explained that the initial version of Sputnik V was effective for the first two years, but starting in the summer of 2022, when new strains of the disease appeared, the effectiveness of the drug began to fall, RIA Novosti reports.
The vaccine being developed to resist the "kraken" may be nasal, the scientist noted. According to him, a person who is vaccinated in this way ceases to be a carrier of the pathogen. Unlike someone who was vaccinated by injection.
It is the nasal vaccine that interrupts the transmission chain, the specialist stressed.
According to him, the scientists of the center prepared new versions of vaccines in the laboratory, they were vaccinated by the center's employees. Clinical trials of Sputnik V based on XBB are being conducted.1.5, they will end on December 10. The new vaccine may enter civilian circulation in March.
