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Because they have mutated to be able to infect hosts that can be used for the energy and materials needed for the virus to be reproduced. They are constantly mutating, and that allows them to adjust to any changes in environment or hosts so that they can survive.
Wiki User
∙ 13y ago
Wiki User
∙ 14y agoMaybe due to poor hygiene, spreading of the virus, inability to cure the virus, know known cure, stuff like that.
Wiki User
∙ 9y agoThey are not alive. They wait until they can attach to a cell.
Wiki User
∙ 11y agoViruses don't eat as they are not classed as living organisms. They survive by reproducing in our cells which spreads diseases
Wiki User
∙ 12y agoCD4 in blood
Wiki User
∙ 11y agotaking oxygen from the cell
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Can a virus survive a human gastrointestinal tract?
Yes, because a virus can survive anywhere.
Why would it not be advantageous for a virus to kill its host?
virus is obligate patogen it only can reproduce by killing the host cells.
Does a virus need living space?
No. A virus needs only a host body to survive. This is the reason many scientists can't decide whether or not a virus should be considered 'alive.'
Can plankton survive without the sun?
Yes! At the bottom of the ocean photosynthesis is not evident but single cell oraganism like plankton thrive but not in abundance.
Why is it impossible to catch a cold at the North Pole?
Probably because the virus cannot survive the cold temperatures there.
How long can the hepatitus virus survive without a human host?
any virus needs a source of energyl to thrive and dies withing munits in abscense of such source. dirty hands-to-food, sharing the flatware is enough.
Can a labrador survive on vegetarian food?
Not just survive, but thrive.
What is the difference between survive and thrive?
There is a difference in the words survive and thrive. The word survive means to continue to live or exists in spite of an accident or tragedy. The word thrive means to grow well or vigorously or to prosper or flourish.
What are synonyms of thrive?
Survive, effort, toil.
Do plants need soil to thrive and survive?
yes
Can a virus survive a human gastrointestinal tract?
Yes, because a virus can survive anywhere.
Can HIV virus survive in hot water?
HIV virus can not survive in hot water.
What are the release dates for Life - Part 2 2007 Survive and Thrive?
Life - Part 2 2007 Survive and Thrive was released on: USA: 12 November 2009
What rhymes with survive and is a simple word?
The word 'alive' rhymes with 'survive' and is a simple word.
Can you give me a sentence with the word survive in it?
It is amazing that animals survive and thrive in the littoral zone. To survive against all odds is heroic.
Which Germanic tribe was able to survive and thrive in Western Europe?
The Franks.
How do animals survive on the Galapagos islands?
Animals survive (and thrive) on the Galapagos islands because they have adapted to the conditions of their environment.
