the Word of God condemns unconditionally all seeking of medical help which excludes a seeking of the Lord, all use of preventatives and cures which disregards God, which fails to acknowledge Him as the giver of both the remedy and the wisdom to apply it. He who struggles against sickness and suffering without humbling himself in prayer and supplication before God, brings upon himself the curse of God. Not only the curse of Eden but a second curse comes upon the man who in foolish pride believes himself wise enough and strong enough and great enough to harness and subdue and control nature.The Practice of Godliness
Very well, by God's decree, the enemy has sent us poison and deadly offal. Therefore, I shall ask God mercifully to protect us. Then I shall fumigate, help purify the air, administer medicine, and take it. I shall avoid places and persons where my presence is not needed in order not to become contaminated and thus perchance infect and pollute others, and so cause their death as a result of my negligence. If God should wish to take me, he will surely find me and I have done what he has expected of me and so I am not responsible for either my own death or the death of others. If my neighbor needs me, however, I shall not avoid place or person, but will go freely.Luthers Works; Vol. 43, pg. 132