“We all hoped for him very much.

We thought there would be vaccination and immunity.

But the rate of vaccination in Russia is low.

In addition, the delta strain began to spread, which reduced the effectiveness of the vaccine, "RIA Novosti quotes Baranova.

The possibility exists that the delta strain will be the last variant of the coronavirus, she said.

Such a development of events will facilitate the fight against the disease.

Earlier, the president of the Russian Scientific Society of Immunologists, Academician Valery Chereshnev, spoke about the optimal timing of revaccination against COVID-19.