Oil fell, capping the biggest weekly loss since October, as the spread of the delta coronavirus variant in China and elsewhere in the world is casting doubts on demand growth.

West Texas Intermediate futures dropped 1.2% Friday and 7.7% for the week. The dollar rose following a better-than-expected U.S. jobs report, weakening the appeal of commodities priced in the currency. China has imposed increasingly strict restriction on mobility to fight the spread of the deadly variant, while records in daily cases were set in Thailand and Sydney, Australia.

“The market is reacting to the concern that the delta variant, particularly in Asia, may erode mobility significantly,” says Bart Melek, head of global commodity strategy at TD Securities. “That implies that we could see significantly less tightness in pricing than we saw prior to this big virus concern.”

After crude soared in the first half of the year on surging demand, the latest chapter in the pandemic has capped prices of not just oil but some other commodities as well. The premium for the nearest WTI contract over second-month futures, known as the promt spread, narrowed to 18 cents after reaching 72 cents a week ago, pointing to ongoing concerns about demand.

“The oil market has struggled this week,” said Jens Naervig Pedersen, a senior analyst at Danske Bank A/S. “On the one hand, markets worry about economic implications of the spreading of the delta variant, but on the other, policy accommodation gives a strong backdrop.”

Despite the weak outlook for demand from Asia, there are some improved metrics in the U.S., where roads have remained busy. Vehicle miles traveled on highways in the week to Aug. 1 match the similar week in 2019, before the pandemic hit, according to the Department of Transportation. Gasoline deliveries to the Spanish market jumped above pre-pandemic levels last month.