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They can kill you.
That depends. All viruses have a marker that binds to a specific site on a cell. For example, HIV virus will only be infectious to humans because only humans possess a cell with the correct binding sites.
Emerging viruses
Viruses that are harmless to humans can be used to infect bacteria or other pests eg rabbits
Bacteria,fungi,or parasitic worms invade the human body.
depends on factors of nutrition and sexual behaviour
Nutrition is crucial for humans to survive.
They can kill you.
the viruses help the immune system adapt and get stronger
the flu...
That depends. All viruses have a marker that binds to a specific site on a cell. For example, HIV virus will only be infectious to humans because only humans possess a cell with the correct binding sites.
The main steps of nutrition in human are:IngestionDigestionAbsorptionAssimilationEgestion
Emerging viruses
you can finde a long list of viruses that effect humans. in the net.It depends from geografical position.Ebola virus it is more widly spreded to Africa, Flu it is world wide spreded.
Bacilli viruses are simply viruses that have a rod-like shape to them. Recently, one of the bacilli viruses has become very famous; Bacillus anthracis which is a bacterium that is commonly known anthrax. This deadly bacteria is dangerous because of its ability to produce endospores which is how bacteria protect themselves, giving them a longer life. Many bio-weapons use bacilli viruses and these can kill humans in various ways.
Computer viruses are currently unable to spread to humans.
Just about anyone who gets the flu. Most of the influenza viruses that cause disease in humans are Type A influenza viruses (but not all). Type A flu viruses are also what cause pandemics in humans.