Lets put it this way:
When you are a child, your body is just developing. You may not be as consious of your health as adults will be.
When you become an adult, you have reahced the peak of your development. Your are now fully aware of your health and can learn to look after it.
When you reach the elderly age, your body systems become worn out and weaken from all those years of work and play. Therefore you don't have enough energy and strenght left to fight the infection or disease.
The former are yet to reach their peak, the latter are past it.
Because they are the weakest links
elderly and babies because their immune system is the weakest
Children-Elderly was created in 1997.
Children-Elderly ended in 1997.
weaker,weakest
The children and the elderly were gassed.
Children
Their immune systems are weaker and if they were to get whatever the vaccination was supposed to prevent or at least minimize, the results would be much worst for them. Small children, particularly infants, and the elderly are more likely to have serious consequences if they contact a disease.
Children and the elderly.
No
Hypernatremia is especially dangerous for children and the elderly