A man in Arizona infected with the West Nile virus became paralyzed from the waist down.
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.
Map showing countries that have reported virus transmission, cases of the virus, or historical cases prior to 2015.
Deaths from hepatitis C are increasing n the U.S., and the increase is hitting particularly hard among middle-age people, a new study says.
Scientists are investigating many more questions about Zika than just how to fight it with vaccination.
Scientists are exploring the possibility of using genetically modified mosquitoes to curb the spread of the Zika virus.
Experts evaluate the threat posed by Zika virus, a denguelike illness that in recent months has spread rapidly across the Americas and has been linked to birth defects.
An outbreak of whooping cough in Florida was surprising to health authorities there -- most of the people who got sick had been fully vaccinated.
Viruses are microscopic parasites that lack the capacity to thrive and reproduce outside of a host body.
Health officials raise concerns about Zika virus, a denguelike infection spreading rapidly in the Americas.
Vitamin C may have a modest effect on how long colds last, but it's unlikely to ward off the wintertime sniffles completely, evidence suggests.
It's possible that people could spread Ebola many months after they have recovered from the deadly viral disease, a new study suggests.