<P> The Missionaries of Charity (Latin: Missionariarum a Caritate) is a Roman Catholic (Latin Church) religious congregation established in 1950 by Mother Teresa, now known in the Catholic Church as Saint Teresa of Calcutta . In 2012 it consisted of over 4,500 religious sisters . Members of the order designate their affiliation using the order's initials, "M.C." A member of the congregation must adhere to the vows of chastity, poverty, obedience, and the fourth vow, to give "wholehearted free service to the poorest of the poor ." Today, the order consists of both contemplative and active branches in several countries . </P> <P> Missionaries care for those who include refugees, former prostitutes, the mentally ill, sick children, abandoned children, lepers, people with AIDS, the aged, and convalescent . They have schools run by volunteers to educate street children and run soup kitchens as well as other services according to the community needs . These services are provided, without charge, to people regardless of their religion or social status . </P> <P> On October 7, 1950, Mother Teresa and the small community formed by her former pupils was labeled as the Diocesan Congregation of the Calcutta Diocese, and thus received the permission from the Vatican to exist as a Church subject . Their mission was to care for (in Mother Teresa's words) "the hungry, the naked, the homeless, the crippled, the blind, the lepers, all those people who feel unwanted, unloved, uncared for throughout society, people that have become a burden to the society and are shunned by everyone ." It began as a small community with 12 members in Calcutta (now Kolkata), and today it has over 4,500 Sisters running orphanages, home for those dying of AIDS, charity centres worldwide, and caring for refugees, the blind, disabled, aged, alcoholics, the poor and homeless and victims of floods, epidemics and famine in Asia, Africa, Latin America, North America, Europe and Australia . They have 19 homes in Kolkata (Calcutta) alone which include homes for women, orphaned children, and homes for the dying, and for those dying of AIDS; a school for street children, and a leper colony . </P> <P> In 1963, Brother Andrew (formerly Ian Travers - Ballan) founded the Missionary Brothers of Charity in Australia along with Mother Teresa . </P>

How many countries are the missionaries of charity in