For the week, Brent crude gained 5.2%, rising for the 7th week in a row for the first time since December,
Brent Crude was up more than 4% trading around $67 a barrel.
Crude oil prices rallied higher with the bias that OPEC+ is likely to extend its oil production cut.
The Russian envoy made the delivery during a courtesy visit to the Ministry of Health in Abuja.
The vaccine is said to be undergoing Phase 3 trials, which is the final stage.
This marks gold's steepest daily decline in nearly five months.
Russia is the fourth-most affected country in the world with more than 750,000 COVID-19 cases.
Russia has always been the black sheep in the OPEC+ family as they tend to ever deviate from consensual commitment concerning the oil market.
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