Micro-organisms are all around us. We cannot see them, but they have the ability to alter our lives and bring them to a standstill. If you've ever seen a virus (and there is little to no possibility of that), you will definitely be amazed at how a speck of almost nothing is responsible for so many diseases and disorders, not only in humans, but also in plants, animals and even bacteria (don't they belong to the micro-organism family too?). The peculiar characteristic of viruses, is that they multiply only in living organisms. That is one of the primary reasons why they are present almost everywhere. Most infectious diseases are caused by viruses, or a combination of viruses and bacteria. Many of them are curable, but some are really dangerous, and can prove to be fatal too. Hence, it is important to know about these diseases and take the necessary precautions against them. Small and simple habits can make a big difference and can help you prevent an onslaught of conditions that can leave you weak and listless. Let us take a look at extensive lists of diseases that viruses can cause in almost any living organism. Only proper hygiene and care can help prevent these diseases. While some of them are easily preventable and curable, some can prove to be fatal if not diagnosed and treated on time. Hence, a viral infection must never be taken lightly. Now, let us move on to our four legged friends, who are not spared by these viruses either. Many of these viral diseases can be transferred from animals kept as pets, livestock or cattle, to humans around them. Hence, it is important to keep the animals in clean and hygienic conditions. After animals, let us now see some of the viral diseases that affect plants. Most of these ruin the plants and crops that they affect. There's no real way to protect the plants from them, other than keeping them clean and well nourished all the time. They attack the plant from within and spread rapidly. Hence, the plant has little or no life after it is affected. These diseases can be very deadly at times. A large number of people have fallen prey to viral diseases and lost their lives to them too. So follow stay clean and eat healthy food to build up a healthy immune system, and have a life free from disease!