As a recent retiree from an organization whose leader told me on my last day of work that he wasn't worried about the virus, that he thought it was 'over-blown' by the media,  I believe a formal standard must be in place and employers must be required to comply.  My former workplace DID have strong safety measures in place, but because it was required.  For many, that will be the only avenue available to protect our workers.   Some employers will see no reason to implement and maintain any safeguards in the work place without an OSHA standard as official guidance.