MTA officials say 41 employees have now died of COVID-19, and another 1,500 have tested positive.
The staffing crunch has posed a challenge for the MTA to keep even diminished subway, bus and commuter rail service going.
More trains will run on the D and 2 lines in response to ridership changes.
Both of those lines had experienced large numbers of workers either sick or self-quarantined with symptoms.
Overall subway ridership is down 92%, the MTA said.
Meanwhile, the NYPD tweeted photos of police on the platform on the number 5 train at 180th street in the Bronx this morning, monitoring the distancing on the train.
A 5-train ready to ferry the city’s essential workers to their destinations at 180th St in the Bronx this morning - checking in and a brief exchange by our District 12 team with fellow frontline @NYCTSubway train crews before they continue their train run. pic.twitter.com/Q4kZcOBKzG— NYPD Transit (@NYPDTransit) April 8, 2020
MORE CORONAVIRUS COVID-19 COVERAGE
Where are the testing centers
See how our communities are making a difference
Free educational resources for parents and children
How you can help victims of coronavirus
Coronavirus news and live updates in New York
Coronavirus news and live updates in New Jersey
Coronavirus news and live updates in Connecticut
New York City updates
Long Island updates
How coronavirus is leaving ghost towns in its path
Coronavirus prevention: how clean are your hands?
Social distancing: What is it and how does it stop the spread of coronavirus?
Coronavirus closures and cancelations
Coronavirus tips: What Americans need to know
Centers for Disease Control and Prevention on coronavirus