How does an unbaptized person receive the baptism of blood? An unbaptized person receives the baptism of blood when he suffers martyrdom for the faith of Christ.

Greater love than this no one has, that one lay down his life for his friends. (John 15:13)

How does an unbaptized person receive the baptism of desire? An unbaptized person receives the baptism of desire when he loves God above all things and desires to do all that is necessary for his salvation.

If anyone love me, he will keep my word, and my Father will love him, and we will come to him and make our abode with him. (John 14:23)