The NIH released a notice on December 19 indicating that all Department of Health and Human Services agencies will be acting under a continuing resolution through Jan. 19, 2018. (Note that Congress extended funding after the NIH notice was released.)
This means that until at least mid-January, grants will be funded up to 90% of the previously committed level. Adjustments may be made later, but there are no guarantees. So be cautious of spending ahead on your award.
For more information, refer to NIH notice number NOT-OD-18-120.