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Influenza
Influenza, commonly referred to as the flu, is an infectious disease caused by RNA viruses of the family Orthomyxoviridae (the influenza viruses), that affects birds and mammals. The name influenza is Italian and means "influence" (Latin: influentia). The most common symptoms of the disease are...
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Pyrexia
Fever (also known as pyrexia, from the Greek pyretos meaning fire, or a febrile response, from the Latin word febris, meaning fever, and archaically known as ague) is a frequent medical sign that describes an increase in internal body temperature to...
Headache
A condition which is characterized by severe pain in the head.
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Cough
A cough ( pronunciation (help·info) Latin: tussis), in medicine, is a sudden and often repetitively occurring defense reflex which helps to clear the large breathing passages from excess secretions, irritants, foreign particles and microbes. The...
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Rigor
Rigor is a shaking occurring during a high fever. It occurs because cytokines and prostaglandins are released as part of an immune response and increase the set point for body temperature in the hypothalamus.
It is sometimes considered a synonym for...
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Malaise
Malaise (IPA /mə'leɪz/, mal-aze) is a feeling of general discomfort or uneasiness, an "out of sorts" feeling, often the first indication of an infection or other disease. Malaise is often defined in medicinal research as a "general feeling of being...
Red eye
In medicine, red eye is a non-specific term to describe an eye that appears red due to illness, injury, or some other condition. "Conjunctivitis" and "bloodshot eyes" are two forms of red eye.
Since it is a common affliction, primary care doctors...
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Muscle weakness
A reduction in the strength of one or more muscles.
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Epiphora
Increased tearing is a symptom for some diseases.
