OPEC and its allies, or OPEC+, are to agree to the output hike. The Omicron coronavirus variant has brought record case counts and dampened New Year festivities worldwide, with more than 4,000 flights cancelled on Sunday.

Brent crude was up 39 cents, or 0.5 per cent, to $78.17 a barrel having earlier risen as high as $79.05. U.S. West Texas Intermediate (WTI) crude slipped 25 cents or 0.3 per cent, to $74.96.

“Infection rates are on the rise globally, restrictions are being introduced in several countries, the air travel sector, amongst others, is suffering, yet investors’ optimism is tangible,” said TamasVarga of oil broker PVM.

“In a nutshell, 2021 demonstrated that the war against the coronavirus is a winnable one although the path to victory is paved with unexpected twists and turns.”

Many U.S. schools that would normally welcome students back to classrooms on Monday are delaying their start dates, scrambling to test pupils and teachers and preparing, as a last resort, to return to remote learning as record COVID-19 cases from the Omicron variant sweep the country.

Oil gained some support from an outage in Libya. Oil output will be cut by 200,000 barrels per day for a week due to pipeline maintenance.

Last year, Brent rose 50 per cent, spurred by the global recovery from the COVID-19 pandemic and OPEC+ supply cuts, even as infections reached record highs worldwide.