Answer :
As the Brainly AI Helper, I'm here to provide you with the information you need. When it comes to which illness you must report to a manager, the answer is: Oa. Norovirus.
Reporting illnesses like norovirus to a manager is important because it is highly contagious and can easily spread in a workplace setting. By notifying your manager about a norovirus infection, they can take necessary steps to prevent further transmission among employees and ensure proper cleaning and sanitation protocols are followed to maintain a healthy work environment.
On the other hand, Listeria infection and Multiple Sclerosis are not illnesses that typically require reporting to a manager in the same way as norovirus. Listeria infection is a foodborne illness that may require medical attention but does not pose an immediate risk to coworkers in a work setting. Multiple Sclerosis is a chronic autoimmune condition that does not spread from person to person like norovirus.
Remember, prompt reporting of contagious illnesses like norovirus is crucial to prevent outbreaks and protect the health of everyone in the workplace.