Bacteria,fungi,or parasitic worms invade the human body.
Viruses that are harmless to humans can be used to infect bacteria or other pests eg rabbits
HIV infects only humans. There are similar viruses that affect other species.
Not all but some do. If a person has a contagious virus then stay away from them. Some travel only buying eating raw meat or poisoned food or dirty water. Another science question d by the wizzo!
viruses are specific to the cells they infect called host cells
Viruses only infect living organisms and since they are not alive, they can not infect other viruses. The question is interesting though.
Yes, they do.
Viruses that are harmless to humans can be used to infect bacteria or other pests eg rabbits
Yes that is correct.
It depends on what kind of virus. Viruses can infect any cell in the human body. Viruses such as HIV infect the immune system; air-born viruses, such as H1N1 or a cold, infect the respiratory system; neurological viruses, like rabies infect the brain (the virus is usually carried to it by peripheral nerves); and viruses like polio effect the nervous system, which can create paralysis.
There are quite a few different dog viruses that are infectious to human beings. Other dog viruses die before they can infect humans.
NO because it's tail fibers will allow it to land only on certain a kind of bacteria and not on human cells.
Not all but some do. If a person has a contagious virus then stay away from them. Some travel only buying eating raw meat or poisoned food or dirty water. Another science question d by the wizzo!
Caulimoviridea are retro viruses that infect plants.
No. Any and all viruses are parasitic. There may not be any helpful viruses, but there are certainly a large quantity of harmless viruses, which doesn't infect humans, but rather specific animals or plants.
Infect cells.
Computer viruses aren't living things. These are pieces of mal-ware created by humans to infect computers with infectiousness software. They cannot harm you in any way, but can destroy a computer.
Dogs and humans have different immune systems and cellular receptors, so viruses that can infect one species may not be able to infect the other. Additionally, genetic differences between species can affect virus transmission and replication within host cells.