With current shortage of vaccines it is quite evident, that first world vaccines are for the first world with a few exceptions So, the choice for the rest of the world is between Russian and Chinese vaccines.
The Soviet Union had mandatory universal vaccination program for ages, so it is not that Russia started developing vaccines yesterday.
And the Arg government had to start the vaccination right away. If they had waited until 70% of population tests positively for antibodies, it would be clear that they failed miserably.
Russia, on the other hand, needed a positive usage case from a country that is not considered a traditional sympathizer. So it started shipping the vaccine to Argentina even before satisfying the domestic demand.
By the way, they are considering to produce Sputnik V in Germany, but it's still missing European Medicines Agency approval.
Chancellor Angela Merkel is "open" to the idea of producing Russia's coronavirus vaccine in the European Union, if approved by the EMA.
www.cnbc.com