I t's widely accepted that HIV, Hepatitis C, Ebola, and the ongoing coronavirus have acquired a bad reputation for viruses due to their aggressive and infectious nature. But actually, there are nice guys in the virology world, microscopic bacteriophages . Different from dreadful bad viruses that will invade the host cell to tak e over the cellular machinery, release more infectious viral particles, and finally cause illness, phages are protective viruses that can attack and destroy bacteria. About Phages Bacteriophage, or known as phage, whose name is derived from the Greek word phagein , indicating the eater of bacteria. These spidery-looking viruses have a population of over 10 31 , larger than the total number of all other organisms, including bacteria, remaining the most abundant life-form on the planet. They could be found almost everywhere bacteria exist , including water, air, soil, the mucous membrane lining of digestive, respiratory,...