I can only speak about the situation in my field. I think everyone is fine for the next 1-2 months as there is enough data to analyze, stuff to read, articles/reviews/chapters/grant applications to write.
After the two months things will start hitting the fan.
I am officially in home office starting from today. Our lab is down to 15%. So some people are "chosen ones" that are allowed to continue working on a 50% shift because those are the closest to a publication.
PhD candidates stay at home and postdocs continue working, in out case.
You cannot publish papers with gaps. I actually expect much more articles to be sent in during this phase because people have to stop running and start to think about what they are actually doing.
This all changes if this continues for more then a few months.