St. Anthony Mary Claret was a Roman Catholic archbishop and missionary. He founded the congregation of Missionary Sons of the Immaculate Heart of Mary, commonly called the Claretians. His Feast day is on October 24th. Since the saint himself received many miraculous cures during his lifetime (including the immediate healing of a gaping wound in his side after he prayed to the Blessed Virgin), people pray to him for healing. Our Lady told St. Anthony Mary Claret that she would obtain from God anything he asked through her Immaculate Heart.
O St. Anthony Mary Claret, who during thy life on earth was often a solace to the afflicted, and didst love and tenderly compassionate the sick, intercede for me as thou dost rejoice in the reward of thy virtues. Cast a glance of pity on (here mention the person afflicted with cancer or other serious ailment) and grant my petition, if such be the will of God. Make my troubles thine own. Ask the Immaculate Heart of Mary to obtain by her powerful intercession the grace I yearn for so ardently, and a blessing that may strengthen me during life, assist me at the hour of death and lead me on to a happy eternity. Amen.
St Anthony Mary Claret, pray for us!