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.
Explore Viruses, Infections & Disease
A clinical trial tested strategies for boosting teens' and young adults' use of HIV-prevention drugs called PrEP.
An NIH study many years in the making starts to unravel the biology of a misunderstood disease called ME/CFS.
Certain gut bacteria reside in colorectal tumors, but the species differ depending on a patient's age, offering hope that our gut tenants could serve as early warning signs of cancer in young people.
The Alaskapox virus belongs to the same broad group as smallpox and mpox, but to date, it's infected fewer than 10 people.
Oregon saw its first human case of bubonic plague in eight years, and officials suspect the infected person's cat sickened them.
People can carry some antibiotic-resistant strains of bacteria for up to nine years, new research suggests.
Scientists investigated flesh-eating infections that took place after record-breaking heat waves in the U.S. last year.
Cases of the STI syphilis are on the rise across all age groups and regions in the U.S., a CDC report based on data from 2018 to 2022 reveals.
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