According to the USCIS:
"On March 18, U.S. Citizenship and Immigration Services temporarily suspended in-person services at its field offices, asylum offices, and Application Support Centers (ASCs) to help slow the spread of Coronavirus Disease 2019 (COVID-19). USCIS offices will reopen on April 7 unless the public closures are extended further. Employees in these offices are continuing to perform mission-essential services that do not require face-to-face contact with the public.
USCIS will continue to provide limited emergency services. Please call the Contact Center for assistance with emergency services.
USCIS field offices will send notices to applicants and petitioners with scheduled appointments and naturalization ceremonies impacted by the extended closure. USCIS asylum offices will send interview cancellation notices and automatically reschedule asylum interviews. When the interview is rescheduled, asylum applicants will receive a new interview notice with the new time, date and location of the interview. When USCIS again resumes normal operations, USCIS will automatically reschedule ASC appointments due to the office closure. You will receive a new appointment letter in the mail. Individuals who had InfoPass or other appointments must reschedule through the USCIS Contact Center once field offices are open to the public again. Please check to see if your field office has been reopened before reaching out to the USCIS Contact Center."