“Revaccination with ‘Sputnik V’ can be done. There are absolutely no problems. Currently, the so-called single-component version of the vaccine, ‘Sputnik Light,’ is registered. It is registered, among other things, in order to raise the level of antibodies after illness or some time after vaccination”, Gintsburg said.

A vial labelled “Sputnik V coronavirus disease (COVID-19) vaccine” is seen in this illustration picture taken May 2, 2021

The Gamaleya chief added that the revaccination with Sputnik Light would develop antibodies against all existing COVID-19 variants.

The slimmed-down version of the vaccine was registered in late March as an alternative to the main two-shot Sputnik V after successfully undergoing all three phases of clinical trials. The latter remains the main option for export and internal use in the country.