What to do to prevent the disease from spreading among other household members?


Ideally, each person in quarantine should have his own apartment or private room and a toilet and bathroom that nobody else will use.  But the reality is quite different and only a fraction of those who are afflicted can afford the luxury of such quarantine.  If you or someone in your household falls ill with the COVID-19 disease, there are rules to follow so that you do not spread the contagion.

One room for the ill person
If possible, reserve one room in your apartment or house for the ill person, even at the cost of reduced comfort for others.  The room where the ill person is staying should not be visited by anyone else.  The patient should only come out if absolutely necessary, for example for hygiene or for meals.  The room should be aired out well and frequently.
Reserve personal items for the ill person that only he will use, and no one else.  Aside from the regular items, such as for personal hygiene, these should include dishes, towels, and bedding.

Wash clothing at the maximum temperature possible
While the person is sick, store his clothing and bedding in plastic bags.  If they need to be washed, use the highest possible temperature that the fabric will allow: for example, cotton can be washed at up to 90 °C.  Temperatures over 60 °C are ideal for all fabrics.  Then iron the laundry at the highest temperature possible.
If a healthy person is doing the patient’s laundry, he should use protective gloves and ideally also a plastic apron that he will disinfect after use.  The area around the washer must also be cleaned.  Simply, clean all places that have come in contact with the ill person’s items.

Last one in the bathroom
Special provisions must be made in the bathroom, too.  It is important to reserve towels for the ill person that only he will use.  And not only for bathing, but also after washing hands and face.  He should always be the last of the family members to use the bathroom, and then he should clean and disinfect the room properly.
The same rules apply in the kitchen.  The infected person should only enter the kitchen when nobody else is in it.  He should merely get his food from there and take it to his room, where he can eat it in peace.  Better yet, if you put the food outside of his door, to prevent him from walking around the apartment needlessly.  The dishes then must be washed with hot water and a detergent.  The ill person should also have his designated tea towel with which his dishes will be dried.  If the caregiver is doing it for him, he must always wear protective gloves.

Double isolation for waste
Set up a special refuse basket in which you will place only items from the ill person, whether it be used tissues or the core from an apple that he has eaten.  Always tie the bags carefully.  When the bag is full, place it in another plastic bag and only then discard in the waste bin.
If the infected person must encounter his caregiver at home, protect yourselves with face masks.  And of course, adhere to the essential rule of washing your hands any time you come in contact with any item previously handled by the ill person.