Why is it sick? The Church has always venerated relics of saints who were temples of the Holy Spirit during their earthly life. Their bodies were tabernacles of Christ when they partook of Christ's Body and Blood. Their relics are holy because Christ made them holy. They lived their vocation to be the image of Christ...and now they are in the presence of the Holy One.
If they are saved, their souls are in the presence of God...
1Co 15:50 Now this I say, brethren, that flesh and blood cannot inherit the kingdom of God; neither doth corruption inherit incorruption.