Marriott saw dramatic improvement in the third quarter as travel demand rebounded in China.

But Marriott President and CEO Arne Sorenson said the recovery remains bumpy, and reinstated lockdowns in Europe and elsewhere could clip bookings.

“Even in China, where there is a much broader sense that COVID is under control, it is not irrelevant yet,” Sorenson said Friday on a conference call with investors.

Average occupancy at hotels in China hit 61% during the quarter, down just 10% from a year ago. That has roared back from February, when occupancy stood at 9%.