Scientists looked closely at how three different germs enter our bodies. The coronavirus uses a specific key to unlock cells, while the flu virus grabs onto sugar molecules on the surface. A common lung bug uses special tools to glide and attach to airways.
These germs also hurt cells in different ways. The coronavirus tricks the cell factory system to make cells stick together. The flu virus attacks the cell power plant to cause cell death. The lung bug uses chemicals to burn cells and create holes in them.
Our immune systems react differently to each germ too. The coronavirus causes a delayed warning signal that leads to high inflammation. The flu virus triggers a different type of immune trap. The lung bug activates a specific alarm system inside the body.
Understanding these differences helps doctors predict long-term lung problems. Some patients might develop scarring or breathing issues because of how the germ hurt the tissue. This knowledge guides better care and new treatments that target specific injury paths.