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Usually mutation. A virus is RNA based, and is somewhat sloppy with it's gene transcription. Most times a virus enters a body it picks up parts of the hosts genetic code. This causes virii to mutate at a much higher rate than other life forms. These mutations can completely change the way a virus manifests itself in the host. Aside from that, they can also jump species. Sometimes a virus will go largely unnoticed in the animal population, mutate at some point, and then become devistating to humans. Supposedly this is where AIDS comes from.
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What is the importance of staying healthy and not passing on infectious disease?
An infectious disease will die off eventually if it is not passed on to new hosts.
Is Parkinson's disease a infectious or noninfectious disease?
non infectious
What is an infectious disease doctor?
a doctor who helps people with infectious diseases.(see infectious disease)
Is pellegra an infectious disease?
Pellagra is not an infectious disease. Pellagra is a nutritional deficiency disease.
What is infectious disease?
an infectious disease is a disease caused by bacterial, viral, fungal, or protozoan infection.
Is piles a infectious disease?
Piles (A Swollen Hemorrhoid) is not a infectious disease.
Is the West Nile Virus an infectious or genetic disease?
infectious disease
Are chemical spills an infectious disease?
Chemical spills are not an infectious disease.
What happens in our body when we have an infectious disease?
What happens in our body when we have an infectious disease
Infectious disease is?
an infectious disease is a disease caused by bacterial, viral, fungal, or protozoan infection.
Are mumps infectious or non infectious?
Mumps is an infectious disease.
Is sars infectious or non infectious?
SARS is an infectious disease.
