Yes, it seems the illnesses could be stopped by having more people stay home when they are sick. It seems like a simple solution, but it's not always practical. First, some illnesses don't show symptoms until after a person is already contageous. Then, there's the issue of spreading germs around the family at home. Parents who are first sick may spread germs to their children and then catch it again while caring for them.
If more people would stay home when they were ill, it would reduce the spread of illnesses. Far too many people go ahead and come into work, or attend other public outings instead of staying home, resting and getting over their illness. Being sick in public increases the amount of people that can get infected and get sick as well.
I don't understand why so many feel they need to drag themselves into work or school when they are ill. Some employers frown upon taking sick days but in the long run forcing employees to come to work only puts healthy workers at risk. Cultures need to change and more needs to be said about this.
Staying at home can help stop the spread of illnesses. Individuals infected can easily spread the disease to others via both skin on skin contact and contact with surfaces. When sick, guidelines should be followed to ensure the infected are no longer contagious before returning to school or work. This ensures the diseases in contained and stopped as quickly as possible