If an employee is injured on the job, whose responsibility is it to take care of any related medical expenses and continue to pay the employee until they are medically-cleared to return to work?

the employee's co-workers
the unemployment office
the employer
the government

The responsibility for taking care of any related medical expenses and continuing to pay the employee until they are medically-cleared to return to work typically lies with the employer. The specific regulations and insurance coverage for such situations may vary between countries and jurisdictions. In many cases, employers are required by law to have workers' compensation insurance, which covers the medical expenses and lost wages of employees injured on the job. This insurance is intended to protect both the employee and the employer in such situations.

I only asked for the answer.

I apologize for the additional information provided. The responsibility for taking care of any related medical expenses and continuing to pay the employee until they are medically-cleared to return to work typically lies with the employer.