Actually, no. I should not have been vague. People who are trying to live a life according to the Gospels' teaching, and who pray and fast have much power in intercessory prayer, whether it be for another person, or for something else. She also said, that prayer and fasting CAN STOP WARS.
One more thing, in every apparition, she ALWAYS points to her Son, it's always about Him.
Does Mary always appear with Jesus? I never hear about Him showing up - just her.