Because a virus goes and attack a host body cell, making a person feel bad.
viruses attack the cells of their host. first they inject their DNA into the cell and go from there. Slowly it weakens the immune system and you get sick.
it makes you ill because it is not your own antibodies so you gain symptoms of the antibodies trying to dispose of the virus. if u need more information check on a biological website
Pet mice and rats do not carry any diseases. Wild rats caused the black plague in the middle ages.
Virus
Alien "germs" from space, or the past, or the future, or a parallel dimension. The "cure" for something --- and the results that accrue. A virus that changes humans into .... (you make it up).
Other than one specific bacteria in cats' feces that can affect pregnant women, there is no crossover between felines and humans. Felines -- cats -- cannot make humans sick with any blood borne illness or virus.
They can infect the body and make you sick
How is the hanta virus carried and how do humans get it
Yes. You will get a stomach virus that will make you diharea all day or you just throw up the virus. Its kinda like the stomach flu.
about a week or even two seconds. It could be one of thoses.
The common cold is a virus. When you are exposed to the virus you get sick. If you are sick with a cold make sure to wash your hands frequently, don't cough or sneeze into your hands, and don't share drinks and food with other people.
Most moldy bread will harm people that eat it. Some mold will not make you sick. Some mold will make you sick. Some mold will make you extremely sick. Unless you know the particular type of mold will not make you sick or kill you, you should not eat it.
Jennifer was a vampire or something!not sick of virus!
A virus will make us sick because it disrupts the function of the cells or actually kills cells. Viruses uses healthy cells in order to replicate.