Symptoms of COVID-19 range from mild to severe. Here are the signs you should watch for and how to ...

Flu signs and symptoms usually come on suddenly. People who are sick with flu often feel some or all of these symptoms: Fever* or feeling feverish/chills; Cough; Sore throat; Runny or stuffy nose; Muscle or body aches; Headaches; Fatigue (tiredness) Some people may have vomiting and diarrhea, though this is more common in children than adults.

10 Symptoms of Viral Infection Fever. Developing a fever is often the most common symptom of a viral infection. A fever is the body's natural way of... Fatigue. When your body fights a virus, it needs lots of energy to destroy the infection. Therefore, you may experience... Headache. Developing a ...

Flu Symptoms. Influenza (flu) can cause mild to severe illness, and at times can lead to ...

Viruses cause familiar infectious diseases such as the common cold, flu and warts. They also cause severe illnesses such as HIV/AIDS, Ebola, and COVID-19. Viruses are like hijackers. They invade living, normal cells and use those cells to multiply and produce other viruses like themselves.

Wheezing. These symptoms usually appear in stages and not all at once. In very young infants with RSV, the only symptoms may be irritability, decreased activity, and breathing difficulties. Almost all children will have had an RSV infection by their second birthday. medical icon.

Because RSV and coronavirus disease 2019 (COVID-19) are both types of respiratory viruses, some symptoms of RSV and COVID-19 can be similar. In children, COVID-19 often results in mild symptoms such as fever, runny nose and cough. For adults with COVID-19, symptoms may be more severe and may include trouble breathing.

Overview. Viral gastroenteritis is an intestinal infection marked by watery diarrhea, abdominal cramps, nausea or vomiting, and sometimes fever. The most common way to develop viral gastroenteritis — often called stomach flu —is through contact with an infected person or by ingesting contaminated food or water.