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Jun 21, 2023 · There are several types of viral disease, depending on the underlying virus. We’ll go over some of the main types, including how they’re spread, treated, and prevented.
Nov 20, 2020 · Common ways that viruses spread from person to person include: Breathing in air-borne droplets contaminated with a virus. Eating food or drinking water contaminated with a virus. Having sexual contact with a person who is infected with a sexually transmitted virus.
Nov 23, 2022 · Viral infections are any illness you get from a virus (a small germ that uses your cells to reproduce). Common viral illnesses include colds, the flu, COVID-19, norovirus (“stomach flu”), HPV (warts) and herpes simplex virus (cold sores).
One family of single-stranded DNA viruses infects humans: Parvoviridae. These viruses are non-enveloped. Positive single-stranded RNA families: three non-enveloped ( Astroviridae, Caliciviridae and Picornaviridae) and four enveloped ( Coronaviridae, Flaviviridae, Retroviridae and Togaviridae ).
Oct 31, 2014 · Viral diseases in humans were first noted in ancient times and have since shaped our history. Scientific approaches to the study of viruses and viral disease began in the 19th century and led to the identification of specific disease entities caused by viruses.
Nov 8, 2023 · Some of the diseases that viruses can cause include the common cold, the flu, COVID-19, and HIV. How are viruses spread? Viruses can be spread in different ways: Through droplets and particles that are breathed out by someone who has the infection. You might breathe in the droplets or particles, or they could land on your mouth, nose, or eyes.
DNA viruses include herpesviruses. RNA viruses include SARS-CoV2, which causes COVID-19. RNA viruses also include retroviruses, such as HIV (human immunodeficiency virus).
Viruses can get into your body through breathing air (for example, the virus that causes COVID-19), having sex, touching something with viruses on it, or being bitten by a bug such as a mosquito or tick. Viruses usually infect only one type of cell—for example, the virus that causes the common cold infects only cells in your nose, mouth, and throat
Categorizing viral infections by the organ system most commonly affected (eg, lungs, gastrointestinal tract, skin, liver, central nervous system, mucous membranes) can be clinically useful, although certain viral disorders (eg, mumps) are hard to categorize.
Feb 18, 2022 · Infectious diseases commonly spread through the direct transfer of bacteria, viruses or other germs from one person to another. This can happen when an individual with the bacterium or virus touches, kisses, or coughs or sneezes on someone who isn't infected.
