MTA services are back up and running in full swing following large amounts of worker absences the past few months. During the peak wave of the Omicron variant, 20% of the around 40,000 bus and subway worker were absent with 70% of those absences being COVID-19 related. The MTA was forced to scale back their services and close some lines. Now all lines have resumed, and worker absences have dropped to 7%.
See "MTA Worker COVID-19 cases are dwindling", David Meyer, New York Post, February 7, 2022