If you think that this is a joke, don't:

Switzerland will not accept certificates on COVID-19 vaccination with Sputnik V for the media accreditation at the upcoming Russia-US summit in Geneva, Pierre-Alain Eltschinger, a spokesman for the Swiss Federal Department of Foreign Affairs, told Sputnik on Wednesday

Here is (in Russian) Russian official version from Ria. Considering the fact that Vladimir Putin and Russian delegation to summit in Geneva are all vaccinated with Sputnik V, Russians finally have their excuse to cancel a generally useless summit and not attend it.