We gotta accept the fact that we are turning less and less resistant to diseases. Actually, we are left with no other choice than intaking antibiotics and stuff in order to stay healthy and that's exactly what making us less immune. But, it seems like we have found a better solution for our health in future. 

The Bacteriophages are the deadliest beings on Earth without any doubt and are the most abundant ones as well. The Bacteriophages are basically viruses that attack and feed on their hosts. Specific kind of Phages attack specific bacteria and ensure their survival . Luckily, they cannot effect us but they actually turned out to be good friends of us when we came to know more about them. Antibiotics have always been an efficient weapon of ours to deal with bacteria that has feared us through ages. But, the antibiotics are now turned out to be bit dangerous as we are multiplying their complexity as of the Bacteria that are continuously evolving against the Antibiotics. These Bacteriophages when injected into the human can target the specific disease causing  bacteria and will kill them without any side effects. This treatment is being tested and has been showing prominent results.

The antibiotics are ruling the field of medicine at present. The Bacteriophages that are expected to replace them offer a very promising future for humans and once accepted as a global method of treatment it could definitely save billions of lives.