COVID-19 affects different people in different ways. Most infected people will develop mild to moderate illness and recover without hospitalization.
Covid-19, spreads very easily, much easier than many other regular illnesses we deal with on a regular basis. That's what makes it so dangerous.
The best course of action is to stay at home prevent the spread of the disease as well as hospitals getting overwhelmed with patients who simply shoudn't be there.
The caregiver should wear a triple layer medical mask. N95 mask may be considered when in the same room with the ill person.