Science Bees: Bacteria vs. Virus — Two Tiny Troublemakers, Two Different Stories (Ep. 35)

Bacteria and viruses both can make you sick. But they're actually very different from each other. Let's break it down. Bacteria are living, single-celled organisms. They can survive on their own, grow, and reproduce by splitting themselves in two—a process called binary fission. Viruses are different. A virus isn't even considered fully "alive" by most scientists. That's because a virus can't reproduce on its own. It has to invade a living cell and use that cell's own machinery to make copies of itself. Here's something interesting: Bacteria are much bigger than viruses. In fact, some viruses are so small that they can infect bacteria themselves. Not all bacteria are harmful. Many bacteria are actually helpful, like the ones in your gut that help digest food. But some, like Salmonella or E. coli, can make you sick. Viruses, on the other hand, are almost always harmful when they infect you. Colds, the flu, and chickenpox are all caused by viruses. Here's a great Science Bee fact: Antibiotics can kill bacteria, but they don't work on viruses at all. That's why doctors won't give you antibiotics for a cold—because a cold is caused by a virus, not bacteria. And here's another cool fact: Scientists estimate there are more viruses on Earth than any other type of biological entity—even more than all the stars in the universe. 🧠 Science Bee Challenge! One of us is alive and can reproduce on our own. The other needs to invade a cell to make copies of itself. Antibiotics work on one of us, but not the other. Which one reproduces using another cell's machinery? ... The virus!