A first-degree relative of a person is any of the following: that person's spouse (or spouse equivalent), children, step-children, siblings, half-siblings, step-siblings, parents or stepparents. A second-degree relative of a person is any first-degree relative of one of that person's first-degree relatives. A relative who is both a first-degree relative of a person and also a first-degree relative of a first-degree relative of that person is deemed to be a first-degree relative of that person. A relative up to the second degree means any first- or second-degree relative.