[to another, exceedingly great faith]: All faith comes as a gift from God, but we are all capable of faith. The particular gift here is not any kind of faith, but rather “exceedingly great” faith. There are those whose faith is powerful, even to the power to move mountains. Such faith is not common, even though we may all achieve some level of faith.
[gifts of healing]: A particular subset of the gift of faith is the gift of healing. It is a particular gift from God given to some. All worthy holders of the Melchizedek Priesthood may participate in the blessing of the sick, and the power of the priesthood is sufficient for all occasions, depending upon faith. Nevertheless, there are those whose gift includes healing.
Reference: 1 Corinthians 12:9 provides the model for this verse:
1 Corinthians 12:9
9 To another faith by the same Spirit; to another the gifts of healing by the same Spirit;