Wednesday Wall Street Journal has two articles questioning the Russian Covid-19 vaccine that are worth reading.

Russia can “win” politically
even if the vaccine is a placebo,
or maybe even a disguised MMR vaccine.

Russia and the old USSR routinely gave children the BCG tuberculosis vaccine, so most living Russians had it.
This alone might make their Covid-19 “true” fatality rate much lower than the USA, UK, Spain or Italy.

Russia might report much lower than true Covid-19 fatalities anyway.