This essential, authoritative work details the complex halachos of refuah as they apply to a sick person as well as a caregiver. A revised and expanded edition of the original Lev Avraham, this version includes piskei halachah regarding a myriad of aspects regarding modern-day medicine including situations that arise in the hospital, at home, in Eretz Yisrael and abroad, Shabbos and Yom Tov. These pages focus on the relevant halachos as they apply to patients, medical staff, and caregivers. The rulings in this book were largely issued by Rav Shlomo Zalman Auerbach, zt"l, and YBLCT Rav Yehoshua Neuwirtz, shlita. The author was privileged to hear these teshuvos directly from these two gedolim. As a noted professor, the author offers astonishing and groundbreaking insight into contemporary medical discoveries which have been alluded to in the writings of the Rishonim and in the Talmud.