On April 10, 2020, OSHA clarified the record ability of COVID-19 with employees as follows:
In areas where there is ongoing community transmission, employers other than those in the healthcare industry, emergency response organizations (e.g., emergency medical, firefighting and law enforcement services), and correctional institutions may have difficulty making determinations about whether workers who contracted COVID-19 did so due to exposures at work. Accordingly, until further notice, OSHA will not enforce its recordkeeping requirements to require these employers to make work-relatedness determinations for COVID-19 cases, except where: (1) There is objective evidence that a COVID-19 case may be work-related; and (2) The evidence was reasonably available to the employer. Employers of workers in the healthcare industry, emergency response organizations and correctional institutions must continue to make work-relatedness determinations pursuant to 29 CFR Part 1904.
You can view and download the guidance here: https://content.govdelivery.com/accounts/USDOL/bulletins/285f353