2022年11月23日 · 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).

2025年1月1日 · Here's what to know about those "bugs" going around, including the virus that causes COVID, the flu, norovirus and RSV. A quadruple whammy of viruses – flu, COVID, norovirus, and respiratory...

2023年6月21日 · 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. We’ll also list ...

2023年12月18日 · Viral infections are contagious illnesses caused by viruses. These infections occur when the virus infects you and attacks the cells in your body. Everyone experiences a viral infection...

2024年6月2日 · Viral infections of your respiratory system include: These viruses can cause bronchitis, ear infections, pneumonia, and other conditions. Common viral infections of your digestive system...

2023年11月8日 · 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.

A viral disease (or viral infection) occurs when an organism's body is invaded by pathogenic viruses, and infectious virus particles (virions) attach to and enter susceptible cells. [1] Examples are the common cold, gastroenteritis, corona, flu, pneumonia. [2] Virions of some of the most common human viruses with their relative size.

2024年9月10日 · Viral infections occur when a virus enters the body and successfully takes over a host cell to begin the process of replicating. This can occur at the site of entry, also known as a localized infection, or the virus can spread throughout the body, causing a systemic infection.

2020年11月20日 · Viral diseases result in a wide variety of symptoms that vary in character and severity depending on the type of viral infection and other factors, including the person’s age and overall health. Common symptoms of viral diseases include flu-like symptoms and malaise.

Most commonly, viral infections involve the nose, throat, and upper airways, or systems such as the nervous, gastrointestinal, and reproductive systems. Doctors may base the diagnosis on symptoms, blood tests and cultures, or examination of infected tissues.