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A viral infection can lead to a spectrum of symptoms from asymptomatic (no overt symptoms) to severe disease. People may get viruses by swallowing or inhaling them, by being bitten by insects, through sexual contact, or congenitally (passed by a pregnant person to the fetus).
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Mar 27, 2024 · Symptoms can include: Dry cough. Shortness of breath. Loss of taste or smell. Extreme tiredness, called fatigue. Digestive symptoms such as upset stomach, vomiting or loose stools, called diarrhea. Pain, such as headaches and body or muscle aches. Fever or chills. Cold-like symptoms such as congestion, runny nose or sore throat.
Nov 8, 2023 · Viruses cause familiar infections such as the common cold, but they also cause severe illnesses. Learn more about viral infections and their symptoms.
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May 24, 2023 · Symptoms. Most often, common cold symptoms start 1 to 3 days after someone is exposed to a cold virus. Symptoms vary. They can include: Runny or stuffy nose. Sore or scratchy throat. Cough. Sneezing. Generally feeling unwell. Slight body aches or a mild headache. Low-grade fever.
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Jan 10, 2024 · Common symptoms of the flu often — but not always — include a fever as well as aching muscles, chills and sweats. Other symptoms include: Headache. Dry, persistent cough. Shortness of breath. Tiredness and weakness. Runny or stuffy nose. Sore throat. Eye pain. Vomiting and diarrhea also are flu symptoms.
Coronavirus, COVID-19. COVID-19 is caused by the SARS-CoV-2 virus. COVID-19 can cause mild to severe respiratory illness, including death. The best preventive measures include getting vaccinated, wearing a mask during times of high transmission, staying 6 feet apart, washing hands often and avoiding sick people.
QUICK FACTS. Overview of Viral Infections. By The Manual's Editorial Staff. Reviewed/Revised Feb 2024. VIEW PROFESSIONAL VERSION. Get the full details. What is a viral infection? |. How can doctors tell if I have a viral infection? |. How do doctors treat viral infections? |. How can I prevent viral infections?
