Medical aids have a rule that the main member has to be over 18 years old since any younger person is a child and therefore a dependent. Not to confuse the issue though, a child of the main member that is older than 18 years and up to 26 years can also be considered a dependent if they are studying and are supported by the main member. A medical aid for children only can prove to be a major problem especially when there is divorce, remarriage or death of the parents with a guardian taking responsibility for the minor(s). Whether it is a full (comprehensive) medical aid or a medical aid hospital plan only, a child or children need to be under a main member who is 18 years and older. A person’s health status or employment does not matter. It’s a matter of the age of the main member.