A virus is defined as any of a various number of submicroscopic parasites that can infect any animal, plant or bacteria and often lead to very serious or even deadly diseases. A virus consists of a core of RNA or DNA, generally surrounded by a protein, lipid or glycoprotein coat, or some combination of the three. No virus can replicate without the help of a host cell, and though they can be spread, viruses lack the ability of self-reproduction and are not always considered to be living organisms in the regular sense. Some of the most common or best known viruses include the human immunodeficiency virus (HIV), which is the virus that causes AIDS, the herpes simplex virus, which causes cold sores, smallpox, multiple sclerosis, and the human papilloma virus, now believed to be a leading cause of cervical cancer in adult women. The common human cold is also caused by a virus. Since a great deal of mystery still surrounds the origins of most modern viruses, ways to cure these viruses and the diseases they cause are still in the very early stages of development.
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Latest Articles

It's Time to Fix Outdated Vaccine Trials
Ebola vaccine trials
February 27th, 2015
Research in humans is a crucial part of our medical system. We need to be able to test that vaccines and drugs are safe and effective in people before they are released to the general public.
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How to Fight Viral Epidemics in the Future
This Ebola virus, as seen through a transmission electron microscope.
November 3rd, 2014
When infectious disease pandemics emerge, viruses tend to be the most lethal. Experts are working on ways to find new antiviral drug treatments, as well as to prevent epidemics from emerging in the first place.
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Ebola vs. Hemorrhagic Fever: What's the Difference?
The Ebola virus
October 9th, 2014
Ebola is a hemorrhagic fever. But not all hemorrhagic fevers are Ebola.
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Even Mismatched, Flu Shot is Protecting You Well (Op-Ed)
Flu vaccination, flu shot, influenza
December 9th, 2014
What does this really mean for for the general public and health-care providers.
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Vaccines Do Not Increase Risk of Multiple Sclerosis
A woman receives a vaccinations
October 20th, 2014
Getting a vaccination does not increase people's risk of developing multiple sclerosis, as some anti-vaccination groups have suggested, a new study finds.
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Office Germs: Viruses Spread Everywhere in Just Hours, Study Shows
illness, sick, health
September 8th, 2014
Keeping your distance from sick co-workers may not be enough to avoid contact with their germs: A new study shows that viruses quickly spread through offices and other buildings.
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Ebola Bomb: Possible, But Not So Easy to Make
August 8th, 2014
Some sources have suggested that Ebola could be used in a terrorist attack, but bioterrorism experts say that weaponization of the deadly virus is unlikely.
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Have a Cold? Don't Ask Your Doctor for Antibiotics
Woman sick on the couch
November 26th, 2014
Studies show that physicians often write prescriptions based on their beliefs about what patients expect.
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Ebola Mortality: Would Outbreaks Be as Deadly in US as in Africa?
Microscopic view of Ebola virus
October 13th, 2014
Ebola mortality rates would be lower if an outbreak occurred in the U.S., experts say.
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Viruses Deflate Huge Algal Blooms at Sea
August 21st, 2014
Gobs of microscopic organisms called algae may have met their match in viruses that can invade their cells, ultimately leading to death, new research suggests.
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