Fungus among us: Though bacteria are the dominant life forms in the microbiome, there are other microscopic critters inside us too -- such as fungi.In a paper published last week in Science and ...

The immune system is a complex network of cells and chemicals that defend the body against harmful invaders like bacteria, viruses, fungi, and parasites. It includes various components such as ...

Virus. The virus is another type of small microorganisms that are smaller than bacteria. Like bacteria, they are also very diverse and have a wide variety of shapes and characteristics.