There was an article in the Washington Post yesterday with some statistics about how many federal employees have filed workers compensation claims through OWCP for Covid-19 illnesses and the disposition of those claims.
If your job has you in contact with other people and you have contracted Covid-19, here is a link to OWCP's instructions with regard to filing your claim:
An exposure claim like this MUST be filed within three years of when you knew or should have known that you were exposed. Because there are a lot of unknowns with regard to long term effects of becoming ill with Covid-19, its important to timely file your claim in case you have lingering effects and later need more treatments due to this illness.