Christians haven't received their glorified bodies yet, and we're still in the fallen world, and so, I have heard of many well-known obvious Christians who have gotten medical conditions. Now then, there are also some other Christians who downgrade the ones getting sick, making them feel guilty...
And when they had preached the gospel to that city, and had taught many, they returned again to Lystra, and to Iconium, and Antioch, Confirming the souls of the disciples, and exhorting them to continue in the faith, and that we must through much tribulation enter into the kingdom of God.
—Acts...