There are many who would say that Mother Teresa was a miracle worker in her own right. However, the Catholic Church has recognized two specific miracles attributed to her intercession – one involving the cure of a woman from cancer, and the other the healing of a man from brain abscesses.
The first miracle took place in 1998, when a woman named Monica Besra claimed that a beam of light emerged from a picture of Mother Teresa, which then cured her of ovarian cancer. The Vatican's commission on sainthood concluded that there was no medical explanation for her cure, and so it was officially recognized as a miracle in 2003.
The second miracle occurred in 2008, when an Indian man named Marcilio Andrade claimed to have been healed from brain abscesses after praying to Mother Teresa. Andrade had been suffering from the condition for over three years and had been told by doctors that he only had months to live. After his prayers were answered and he made a full recovery, doctors could find no trace of the abscesses in his brain. Once again, the Vatican's commission on sainthood found no medical explanation for the healing and so it was declared a miracle in 2015.