Although Joan was officially excluded from the first three miracles due to her martyrdom, she nonetheless accomplished them; three nuns were miraculously healed of cancer after praying to Joan. Joan purportedly healed a woman of TB and another woman of a hole in her foot on her way to canonization.
In addition, many other miracles have been attributed to Joan, both before and after her death. It is common for people who believe that Joan has interceded on their behalf to ask that some miracle be performed as proof of this gift from God. The Church does not doubt these miracles, but because they occurred while Joan was alive they cannot be used as evidence that she was sent by God.
After her death, more miracles were reported to have taken place due to the influence of Joan's spirit. One such story concerns a peasant girl named Margaret whose tongue had been cut out during the massacre of her village. When she was brought to Rouen for execution, she told the guards that if they did not take off her clothes or hurt her, she would go back home. The guards removed her clothes and wounded her instead. Her relatives came to visit her in the hospital and found that her tongue had been restored by divine intervention.
Another story concerns a man named John le Grant. He was imprisoned at Rouen for having fought on Joan's side in the war.
Mother Teresa was canonized as Saint Teresa after two independent healing miracles were attributed to her after her death. The first alleged miracle occurred in 1964 when a five-year-old girl in India named Lucia de Biasi claimed to be in contact with Teresa's spirit and that she was providing information about the children who had died in the community where they lived. Further investigations confirmed that all of the children had indeed died; however, it was also discovered that several of them had been poisoned by their parents, possibly as a way to get rid of them.
In another case reported by Mother Teresas biographer John Allen Paul II declared two other women saints: Katherine Drexel and Maria Makoveych. Like Teresa, both women were born into wealthy families but became religious rebels who lived on the streets before being sent to work with lepers in India. They returned to the West after several years and founded orders for Catholic nuns and priests who worked with impoverished people. Mother Teresa said of Katherine Drexel that she was "a star" who had found her own way through Christ's love. Maria Makoveych was born in Russia but moved with her family to Canada as a child.
From her headquarters in Calcutta, Mother Teresa spent the most of her life attempting to help the ill and needy. Mother Teresa was credited with two healing miracles. The first miracle occurred in 1975 when a young woman in India who had been diagnosed with leukaemia went into remission after touching Mother Teresa's handprint on a wall at her center.
The second miracle occurred in 2009 when Dr. Gopal Singh Khalsa, a neurosurgeon from New Jersey, reported that he treated a woman in India who was suffering from headaches and neurological problems. After performing brain surgery to remove a tumor, he found that the woman's symptoms had disappeared. He concluded that there must be something about Mother Teresa that is medicinal and can heal brain tumors.
So yes, Mother Teresa has been credited with two miracles. In addition to this, it is also believed that she has several other miracles waiting to be revealed.
The first miracle was reported by Dr. John Montefusco, who in May 1975 visited a hospital in Calcutta (now Kolkata) where Mother Teresa had died four months before. He saw an old woman lying in bed who had been diagnosed with stomach cancer. Although she had been told there was no hope for her, the woman's condition improved so dramatically that she made a full recovery. Dr. Montefusco wrote later: "I believe without any doubt that if [the patient] had not received care from Mother Teresa, she would have died."
The second miracle occurred in September 1995 when Archbishop Angelo Amato conducted a ceremony at which it was claimed that Mother Teresa had saved a baby's life. The mother had sought medical help for her daughter after noticing that she wasn't feeding properly. However, the doctors could find no cause for her illness and advised that she be put down. A few days later the girl started crying because someone was taking away her painkiller cap. When asked what had happened, the child replied that a lady named "Mommy Teresa" had come and taken away her painkiller cap.
She founded many institutions to provide assistance to those in need. However, not all activities carried out by Mother Teresa were done voluntarily; she received financial support from a religious community called The Missionaries of Charity who worked under her direction.
In addition to her work with the poor, Mother Teresa led a devout Catholic life. She frequently visited hospitals and nursing homes and preached about love and charity. She wrote several books on spirituality that have sold millions of copies around the world. One such book is A Greeting of Peace which was published in 10 different languages and has been translated into more than 20 languages.
According to reports, since her death in 1997, hundreds of people have reported being cured of illnesses such as cancer, AIDS, and Parkinson's disease through prayerful mediation by Mother Teresa's body parts. The Missionaries of Charity claim that they performed tests on samples of Mother Teresa's hair, blood, and bones and found no evidence of disease. They believe that she will be resurrected at the end of time.
However, not all Catholics agree with this practice.
On December 17, 2015, Pope Francis validated Mother Teresa's second miracle. This was the healing of a 42-year-old Brazilian guy with a lot of brain tumors in 2008, just minutes before he was scheduled to undergo surgery. This healing paved the groundwork for her to be canonized as Saint Teresa.
Mother Teresa did have some miraculous effects during her lifetime. For example, she obtained a few drops of blood from each of her donors and stored it in coagulase-negative staph bacteria so that in case someone needed a transplant, there would be no shortage of donations. She also received hundreds of letters from all over the world asking for prayers for people who had been healed or had other problems resolved.
However, not every person who asked for prayers were actually told to pray for themselves. Mother Teresa only prayed for people she knew personally or who had been recommended to her by others. In fact, according to her own words, she never asked anyone to pray for her.
Furthermore, not every person who asked for prayers was told to come back if they experienced any changes due to the help of Mother Teresa. If they didn't return after a while, then this meant that the problem being prayed for had already been resolved naturally without any help from God or Mother Teresa. Only those people who returned after their requests were granted could say with certainty that Mother Teresa had intervened on their behalf.