On his personal Facebook account, Mark Zuckerberg offered an update on the company’s roadmap for bringing employees back to work in the wake of the coronavirus pandemic.

In the post, he acknowledged that while it might be possible for a small portion of “critical employees” unable to do their work remotely to return sooner, the majority of Facebook’s workforce will be required to continue working from home through “at least” the end of May. The selection of employees Facebook will prioritize for the swiftest return includes content reviewers who scan the platform for things like terrorism and self-harm as well as engineers who work with complex hardware. “…Overall, we don’t expect to have everyone back in our offices for some time,” Zuckerberg wrote.