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Longer-term effects of COVID-19 have become a prevalent aspect of the disease itself. These symptoms can be referred to by many names including post-COVID-19 syndrome, long COVID, and long haulers syndrome. An overall definition of post-COVID conditions (PCC) can be described as a range of symptoms that can last for weeks or months. [83]
How are treatments different for COVID, flu, and RSV? When it comes to addressing symptoms, all three of these viruses have similar symptom-specific treatments, Dr. Russo says.
Middle East respiratory syndrome (MERS) is a viral respiratory infection caused by Middle East respiratory syndrome–related coronavirus (MERS-CoV). [1] Symptoms may range from none, to mild, to severe depending on age and risk level. [6] [1] Typical symptoms include fever, cough, diarrhea, and shortness of breath. [1]
The most common symptoms are vomiting and diarrhea. However, additional symptoms may occur, including chills, nausea, headache, abdominal cramps, myalgia , and fever though it is very rare. While patients frequently start to show symptoms after the 1–4 day incubation period, there have been cases in which an individual is asymptomatic.
Nausea or vomiting. Diarrhea “Symptoms haven’t really changed much over time except, as a population, we’ve built more immunity from vaccination and prior infection,” says Thomas Russo, MD ...
The presence of bright red blood in stool, known as hematochezia, typically indicates lower gastrointestinal bleeding. Digested blood from the upper gastrointestinal tract may appear black rather than red, resulting in "coffee ground" vomit or melena. [2] Other signs and symptoms include feeling tired, dizziness, and pale skin color. [18]
Some viruses attach to molecules present on the surface of red blood cells, for example, influenza virus. [10] A consequence of this is that – at certain concentrations – a viral suspension may bind together (agglutinate) the red blood cells thus preventing them from settling out of suspension. [citation needed]
Hematemesis is the vomiting of blood. [1] This is usually vomit that contains bright red blood. [2] Coffee ground vomiting is similar to hematemesis, but is distinct in not involving bright red blood. [3] Hematemesis must be differentiated from hemoptysis (coughing up blood) and epistaxis (nosebleed). [4] Both of these are more common conditions.