During WWII the army developed the buddy system so that soldiers were paired to look after each other in battle and stress situations. With the development of cell phones and e-mail and GPS it should be possible to extend this to older people and people with medical problems. Frequently people are left without relatives or friends to keep an eye on them when they have medical difficulties. If an organization was developed to pair people with similar medical problems so that they could frequently check on each other at convenient intervals with an understanding of what their particular dangers might be, it might save lives of people who, under present circumstances, have no one to care about their condition. It would have to be done carefully to prevent criminals from taking advantage of helpless people but it might save people who have limited funds from going without anybody to care about how they are managing.
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To the extent these "buddies" have the phyisical and mental capacity to do so, yes.
Admittedly two people undergoing Alzheimers would have problems.