Yes! We all have the potential to be healers. Anyone can become an open channel for healing energy, both for themselves and others.
Reiki is not something that can be learned from a book - the knowledge is passed on from Reiki Master/Teacher to student energetically. Once the pathway is opened, healing energy can be directed to oneself, others, plants, animals, and even situations.
And, once you have the ability, it is never lost. It only becomes stronger with use.
There are four degree levels of training in our lineage of Usui Reiki. The material covered in each level has been expanded to give the student as complete knowledge of the healing process as possible. The training is thorough, the empowerments effective, and help with personal and/or professional healing work is ongoing.