Corona Shiurim

Safek Pikuach Nefesh: Here, here and here.

Explaining beautifully the wondrous chiddush of the Maggid Mishna that we are allowed to be מחלל שבת for a חולה שיש בו סכנה even if there is no פיקוח נפש involved in this particular action. Also, the psak of Rav Chaim that a חולה שיש בו סכנה can eat however much he wants on Yom Kippur and not just שיעורים. [Hebrew]