Del. Code tit. 16, § 530

Nothing in this subchapter shall be construed to authorize or empower the medical treatment of any person who desires treatment by prayer or spiritual means, in the exercise of religious freedom; provided however, that said person shall be isolated or quarantined, or both, at the patient’s expense, and while so quarantined or so isolated, or both, shall comply with all applicable sanitary rules, laws and regulations.