NIH understands that the emergency declaration related to novel coronavirus (COVID-19) will adversely affect many NIH applicants’ ability to submit applications in a timely manner. Therefore, all grant applications submitted late for due dates between March 9, 2020, and May 1, 2020, will be accepted through May 1, 2020.
https://grants.nih.gov/grants/guide/notice-files/NOT-OD-20-091.html