Is bacteria harmful how harmful?

great question. some are bad but 98% (something like that) are good! Just learned that in school. hope this helps :)

Bacteria live everywhere in the air, in soil, in water, in food, and on every sort of plant and animal. They live inside our bodies and, while some bacteria are harmful to humans and other animals...

Yes they r cuz they can give a desease or a sickness/illnes

Yes. Most bacteria is not harmful to us such as bacteria in a yogurt, but some bacteria is harmful.

Yes ! Beneficial bacteria are everywhere. They are in the food that we eat, the air that we breathe and the water that we drink. They appeared on earth over 3.7 billion years ago and have colonised...