Here's an example of someone who was not healed by Jesus during His ministry here on earth:
Acts 3:
1 Now Peter and John went up together into the temple at the hour of prayer, being the ninth hour.
2 And a certain man lame from his mother's womb was carried, whom they laid daily at the gate of the temple which is called Beautiful, to ask alms of them that entered into the temple;
3 Who seeing Peter and John about to go into the temple asked an alms.
4 And Peter, fastening his eyes upon him with John, said, Look on us.
5 And he gave heed unto them, expecting to receive something of them.
6 Then Peter said, Silver and gold have I none; but such as I have give I thee: In the name of Jesus Christ of Nazareth rise up and walk.
7 And he took him by the right hand, and lifted him up: and immediately his feet and ancle bones received strength.
8 And he leaping up stood, and walked, and entered with them into the temple, walking, and leaping, and praising God.
9 And all the people saw him walking and praising God:
10 And they knew that it was he which sat for alms at the Beautiful gate of the temple: and they were filled with wonder and amazement at that which had happened unto him.
The guy in Acts 3 was in his 40s (Acts 4:22) and he was carried to the gate of the temple on a daily basis (Acts 3:2). Do you think Jesus didn't know the lame man was there? Or that the lame man did not hear about Jesus as he sat daily at the temple gate?
God has His reasons as to why or why not a person is healed and it is best that we not question His wisdom in the matter. God's people are sometimes not healed. People who do not believe are sometimes healed. And sometimes healing is delayed, as we see in the record in Acts 3.