Existing law establishes a workers' compensation system, administered by the Administrative Director of the Division of Workers' Compensation, to compensate an employee, as defined, for injuries sustained in the course of employment. Existing law creates a disputable presumption that specified injuries sustained in the course of employment of a specified member of law enforcement or a specified first responder arose out of and in the course of the employment. Existing law governs the procedures for filing a claim for workers' compensation, including filing a claim form, and provides that an injury is presumed compensable if liability is not rejected within 90 days after the claim form is filed, as specified. Existing case law provides for how certain presumptions may be rebutted. Existing law defines "injury" for an employee to include illness or death resulting from the 2019 novel coronavirus disease (COVID-19) under specified circumstances, until January 1, 2023. Existing law creates a disputable presumption, as specified, that the injury arose out of and in the course of the employment and is compensable, for specified dates of injury. Existing law requires an employee to exhaust their paid sick leave benefits and meet specified certification requirements before receiving any temporary disability benefits or, for police officers, firefighters, and other specified employees, a leave of absence. Existing law also make a claim relating to a COVID-19 illness presumptively compensable, as described above, after 30 days or 45 days, rather than 90 days. Existing law, until January 1, 2023, allows for a presumption of injury for all employees whose fellow employees at their place of employment experience specified levels of positive testing, and whose employer has 5 or more employees. This bill would extend the above-described provisions relating to COVID-19 until January 1, 2024. The bill would also expand the above-described provisions applicable to firefighters and police officers to include active firefighting members of a fire department at the State Department of State Hospitals, the State Department of Developmental Services, the Military Department, and the Department of Veterans Affairs and to officers of a state hospital under the jurisdiction of the State Department of State Hospitals and the State Department of Developmental Services.