Even before the knowledge of science exists, these things such as viruses already exsisted.....the scientist will know in time.
There are thousands of different types of viruses that exist in the world. These viruses can infect various organisms including animals, plants, and bacteria. It is estimated that only a small fraction of all viruses have been identified and studied so far.
Viruses have the ability to greatly affect life on earth. Many viruses, such as HIV and influenza have killed millions of people. By studying viruses, scientists are able to develop vaccines that will protect people (and animals) from viruses.
There are many microorganisms in sewage.
Unlike living things viruses don't have a metabolism, making them obligatory parasites (they can only reproduce if there's a host cell they can hijack). They also aren't a cell, which is considered by many to be the minimal organisational structure of living things.
Scientists have discovered and described approximately 1.75 million species of organisms. However, it is estimated that there may be as many as 8.7 million species on Earth, meaning that many more species are yet to be discovered.
because viruses change everyday a virus is made that we haven't found out about
because viruses change everyday a virus is made that we haven't found out about
Computer viruses are currently unable to spread to humans.
Scientists believe there are many types of viruses due to their high mutation rates, ability to adapt to different environments, and diverse host range. This variability allows viruses to infect various organisms and evolve rapidly, leading to the emergence of new virus strains and types.
Scientists do not know how many viruses there are because new ones are constantly being made from old ones joining.
Viruses have the ability to greatly affect life on earth. Many viruses, such as HIV and influenza have killed millions of people. By studying viruses, scientists are able to develop vaccines that will protect people (and animals) from viruses.
Some scientists are hoping that viruses can be modified to undo damage by other viruses, but there is no actual working "damage control" virus available as of July of 2013. Many scientists are concerned that even the good virus might have unwanted side effects.
There are many different types of scientists because one person could not handle all the information of geology, astrology, and other types of science. Since there are numerous types of sciences, there has to be many different types of scientists, so there are many different scientists because there are many different sciences.
There's so many here's a few:TrojanWormBloodhoundBeastThose are the most common and dangerous viruses.
Many different scientists.
There are thousands of different types of viruses that exist in the world. These viruses can infect various organisms including animals, plants, and bacteria. It is estimated that only a small fraction of all viruses have been identified and studied so far.
If you go to the Microsoft website, they have several different "how to" guides for many different types or errors and problems, including a check for Microsoft viruses.