MOSCOW, January 22. /TASS/. The immune response to novel coronavirus is not developed earlier than 32-45 days after the vaccination, or 52 days later maximum, Alexander Gorelov, the deputy director for science of the Central Research Institute of Epidemiology at the Russian Federal Service for Surveillance on Consumer Rights Protection and Human Wellbeing, said on Friday.

"We know that [antibodies are not produced] earlier than after 32-45 days, whereas the maximum amount is developed after four incubation periods, or 56 days later, when we all can adequately breathe freely. However, it does not mean that we can stop wearing masks," he said on the Doctor television channel.

Gorelov pointed out that people should not worry if they miss the date of their second shot for some reason.

"Actually, it is not so critical, as the world has information that certain countries use vaccination within six weeks. So I think time might be chosen within this lapse. In fact, we are already aware that a classic example - 30-45 days between the vaccinations - is an acceptable timeframe," the expert said.

On January 18, Russian regions launched a mass vaccination against the coronavirus. The country’s residents can receive one of the two registered vaccines Sputnik V or EpiVacCorona for free.