The priests work mainly in the area of spiritual care for the sick and the brothers provide trained physical care. Besides the common three vows, the members of the Order take a fourth vow to serve the poor sick, even when they are infectious, even at the risk to their own lives.
The clergy primarily focus on spiritual support for the ailing, while the brothers deliver trained medical care. In addition to the traditional three vows, members of the Order take an extra commitment to serve the impoverished and sickly individuals, even when they are contagious, at the risk of endangering their own well-being.