Ever wonder why December through March is the high season for cold and flu germs? Scientists at NIH may have the answer
We know lipids as the molecules in cholesterol, fats, oils, and waxes (different from fatty acids, like the unhealthy transfats New York City recently banned). We're maybe less familiar with them as a key structural component of cell membranes. They are not only part of the mix that makes up the semipermeable membrane between the cell wall and the guts of a cell, they're also responsible for shielding a cell's organelles, enclosing each in a protective membrane.
Lipids also make up the protective outer layer on viruses (called an envelope).