A friend of mine was vaccinated against Sputnik-V coronavirus.
According to him, this is a difficult test for the body. The vaccine is perceived as a foreign substance. For two or three days his arm was very sore. He was drenched in sweat. However, then these symptoms disappeared. For this, the second injection is much worse tolerated by the vaccinated than the first.
Many Russians are skeptical about the use of the vaccine.
This applies not only to Sputnik-V, but in general to any vaccine developed in the world.
Actually Russia is one of the few countries with an oversupply of the vaccine right now. As per the government, some 1.7 million people have received both doses of the vaccine so far, but the number of individuals enrolling for the vaccination program is slowing down. There seems to be a lot of mistrust. But this vaccine (Sputnik V) is being exported to a large number of countries including Argentina and the UAE and in these countries the people are very positive about it.