HUD foreclosures/evictions are on hold through May 1, 2020, and Fannie Mae/Freddie Mac foreclosures/evictions are on hold for at least 60 days, as of March 19, 2020.

This is a changing landscape, so this information may be out-of-date by the time you read it.

President Trump directed HUD (Department of Housing and Urban Development) to suspend foreclosures and evictions through the end of April.

According to the Business Insider, about 6.7 million people live in HUD-provided housing — but over 80 million do not live in HUD housing. See:
https://www.businessinsider.com/hud-halts-evictions-and-foreclosures-coronavirus-2020-3

Additionally, the FHFA (Federal Housing Finance Agency) is ordering Fannie Mae and Freddie Mac to suspend their foreclosures and evictions for at least 2 months. This covers single family mortgages, home equity conversion mortgages, and reverse mortgages. See:
https://www.cbsnews.com/news/trump-hud-suspending-evictions-foreclosures/

As for how many people this affects, I don’t know. I called a larger foreclosure law firm, and they have no idea either. On some of their cases, they have been directed (by their mortgage company clients) to do everything up to actually scheduling the foreclosure sale (notice of default, file processing, etc). On other cases, they may be putting everything on hold for the next 2 months. It is really up in the air.

What I can say is that if you fall behind on mortgage payments, you will still have the option of filing a chapter 13 repayment plan to catch up on those payments over a 5 year plan with the bankruptcy court.