The Pfizer study enrolled 43,661 people. Why so many people? Would the company’s results be as convincing if it enrolled, for example, just 100 people?

The current thought on the structure of the cell membrane is: a. a static phosphate sandwich of lipids b. a fluid-mosaic of phospholipids and proteins c. a bilayer of proteins with static lipid molecules d. an impermeable bilayer of protein molecules e. a static and permeable phospholipid single layer