This is regarding the demand for hospital beds with oxygen supply.
It has been noticed in the past that people with excess calcium in their blood have enlarged hearts, lungs etc. We can infer that calcium intake increases the lung size and facilitates easier breathing.
So we can administer a few doses of calcium (plus Zinc, Magnesium and Vitamin D) to people waiting in line for beds, as a temporary measure until alternative arrangements are made, except to those who have cardiovascular problems, blood-clotting etc. It may be noted that a few doses of calcium may not cause any serious problems / side effects, and calcium is easily available and inexpensive.