For those with limited mobiliy

You may be accustomed to being able to easily get out and about.
If you lose that ability, it is probably time to use some of the other abilities that you have to achieve what you want to do.
For example if you like supporting your favourite charity selling raffle tickets by visiting your friends, you may be able to call your friends on the phone instead. Sometimes a friend may come and visit you. Other times he or she and you may be able to support each other as you share together on the phone.