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Related Concept Videos

Common Respiratory Disorders01:31

Common Respiratory Disorders

1.2K
Respiratory disorders, a prevalent health concern globally, are generally divided into two primary categories: upper and lower respiratory tract disorders. The categorization is based on the area of the respiratory system they affect.
Upper respiratory disorders impact the airways above the vocal cords, encompassing areas like the nose, sinuses, and throat. Various conditions fall under this category, including the common cold and allergic rhinitis. These disorders can stem from several causes,...
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Chronic Pharyngitis01:23

Chronic Pharyngitis

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Chronic pharyngitis refers to persistent inflammation of the pharyngial mucosa.
Etiology
It often arises from persistent viral or bacterial infections affecting sinuses and tonsils.
Additional contributing factors include inadequate dental hygiene, mouth breathing, recurring tonsillitis, allergic rhinitis, laryngopharyngeal reflux, and exposure to smoke, chemicals, and other environmental pollutants. Allergic reactions to pollen, mold, and pet dander, chronic cough, excessive voice usage,...
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Upper Respiratory Drugs: Decongestants01:27

Upper Respiratory Drugs: Decongestants

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Decongestants are a class of medications used primarily to alleviate nasal congestion, a common symptom resulting from allergies, colds, sinusitis, and other upper respiratory tract infections. These drugs work by activating α-adrenergic receptors, constricting small blood vessels in the nasal membranes. This action results in the opening of clogged nasal passages, thereby facilitating sinus drainage and relieving congestion.
Most decongestants are readily available over-the-counter in...
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Acute Pharyngitis01:30

Acute Pharyngitis

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Introduction
Acute pharyngitis is the inflammation of the back of the throat (pharynx), commonly resulting in a sore throat. It is a frequently encountered condition that prompts individuals to seek medical advice.
Classification
Acute pharyngitis can be categorized based on its underlying cause:
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Methods of reducing fever01:22

Methods of reducing fever

1.1K
The signs and symptoms of fever include hot and dry skin, flushed face, thirst, muscle aches, anorexia, headache, tachycardia, tachypnea, and fatigue. Elevated body temperature is reduced using two methods: pharmacological and nonpharmacological. Proper identification and treatment of the root cause of a fever is of utmost importance.
Pharmacological Methods of Reducing Fever:
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Types of Fever01:25

Types of Fever

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Fever can be triggered by several factors, including infections, nervous system disorders, certain cancers, blood diseases like leukemia, embolism, thrombosis, heatstroke, dehydration, surgical trauma, crushing injuries, and allergic reactions.
Here are the different types of fever:
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Related Experiment Video

Updated: Dec 19, 2025

Experimental Human Pneumococcal Carriage
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An uncommon cold.

Anthony King1

  • 1is a freelance science journalist based in Dublin, Ireland. He tweets occasionally at @antonyjking.

New Scientist (1971)
|June 6, 2020
PubMed
Summary
This summary is machine-generated.

Coronaviruses have previously jumped from animals to humans. Studying these past zoonotic events can provide valuable insights for understanding and preventing future pandemics.

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Area of Science:

  • Zoonotic diseases
  • Epidemiology
  • Viral evolution

Background:

  • Coronaviruses are a known cause of zoonotic diseases.
  • Previous coronavirus outbreaks, such as SARS and MERS, originated in animals.
  • Understanding the animal-to-human transmission of coronaviruses is crucial for public health.

Purpose of the Study:

  • To review previous coronavirus zoonotic events.
  • To identify lessons learned from past animal-to-human transmissions.
  • To inform strategies for preventing future coronavirus pandemics.

Main Methods:

  • Literature review of past coronavirus outbreaks.
  • Analysis of epidemiological data from zoonotic events.
  • Examination of viral genetic sequences and host interactions.

Main Results:

  • Coronaviruses have repeatedly crossed the species barrier from animals to humans.
  • Factors such as viral mutations and human-animal contact facilitate zoonotic spillover.
  • Effective surveillance and early intervention are key to controlling outbreaks.

Conclusions:

  • Past coronavirus zoonotic events offer critical lessons for managing COVID-19.
  • Continued research into viral reservoirs and transmission dynamics is essential.
  • Global cooperation is vital for pandemic preparedness and response.