The article is in Russian: translate.google.com/translate?sl=ru&tl=en&u=https%3A%2F%2Fwww.fontanka.ru%2F2020%2F08%2F11%2F69416050%2F
Excerpt:
“The protective caption is currently unknown. The duration of the protection is unknown. No clinical studies have been conducted to study the epidemiological effectiveness, ”the report says.
This may be partly due to the fact that on the 42nd day from the start of vaccination, neutralizing antibodies to the virus with an average titer of 49.3 were detected in the blood serum of all volunteers.
The titer is the limiting dilution of serum at which antibodies can be detected. The lower the value of mIU / ml (international milliliter per milliliter), the less antibodies in the body. The value of 49.3 does not even reach the average level of antibodies. As a rule, it becomes even smaller over time.