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Related Concept Videos

Acute Respiratory Failure-V01:29

Acute Respiratory Failure-V

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The treatment for acute respiratory failure varies based on factors like the underlying cause, overall health, and severity. A collaborative healthcare team is essential for early detection, often through arterial blood gas analysis. Identifying the cause is the primary goal, with treatment strategies adjusted for ventilation/perfusion (V/Q) mismatch, shunting, or diffusion impairment.
Ensure that patients are monitored continuously for their response to therapy, including changes in...
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Acute Respiratory Failure-II01:21

Acute Respiratory Failure-II

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Type I Respiratory Failure, or hypoxemic respiratory failure, occurs when the partial pressure of oxygen (PaO2) in arterial blood falls below 60 mmHg while breathing room air without a corresponding increase in arterial carbon dioxide levels (PaCO2). This condition highlights a significant impairment in the lungs' capacity to oxygenate the blood.
The underlying physiological abnormalities that contribute to hypoxemic respiratory failure include:
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Acute Respiratory Failure-I01:21

Acute Respiratory Failure-I

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Acute respiratory failure is a condition characterized by the inability of the lungs to perform their primary function: gas exchange. This failure leads to insufficient oxygen levels (hypoxemia) in the blood, elevated carbon dioxide levels (hypercapnia), or both, causing critical impairment in organ function.
Definition: It is defined by specific criteria based on blood gas measurements. Hypoxemia happens when the partial pressure of oxygen (PaO2) falls below 60 mmHg. At the same time,...
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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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Acute Respiratory Failure-III01:30

Acute Respiratory Failure-III

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Hypercapnic respiratory failure, also known as Type 2 or ventilatory respiratory failure, is a severe condition characterized by the body's inability to effectively remove carbon dioxide (CO2) from the bloodstream. It leads to an arterial CO2 pressure (PaCO2) exceeding 45 mmHg and a blood pH above 7.35. This situation indicates that the body's ventilatory demand, or the ventilation needed to maintain normal PaCO2 levels, surpasses its supply or the maximum gas flow achievable without...
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Rous Sarcoma Virus (RSV) and Cancer01:03

Rous Sarcoma Virus (RSV) and Cancer

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Rous Sarcoma virus or RSV was discovered by F. Peyton Rous in the year 1911 as a filterable transmissible agent that could cause tumors in chickens. He won a Nobel Prize for this discovery in 1966. His experiments clearly demonstrated that some cancers could be caused by infectious agents and led to the discovery of many more cancer-causing viruses in animals as well as humans.
RSV is a retrovirus that contains two copies of a plus-strand  RNA genome. Its genome consists of four main open...
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Related Experiment Video

Updated: Jan 14, 2026

Live Imaging and Quantification of Viral Infection in K18 hACE2 Transgenic Mice Using Reporter-Expressing Recombinant SARS-CoV-2
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Acute SARS-CoV-2 infection.

Amy C Sherman1, Glenda E Gray2, Bin Cao3

  • 1Division of Infectious Diseases, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA.

Nature Reviews. Disease Primers
|October 24, 2025
PubMed
Summary
This summary is machine-generated.

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) caused a global pandemic, leading to millions of deaths. Research has yielded vaccines and treatments, but ongoing surveillance and development are crucial for future preparedness.

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Area of Science:

  • Virology
  • Immunology
  • Epidemiology

Background:

  • Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) emerged in late 2019, causing the COVID-19 pandemic.
  • COVID-19 presents a spectrum of illness, from asymptomatic cases to fatal pneumonia.
  • Viral variants, host factors, and exposure influence disease severity.

Purpose of the Study:

  • To review the development of preventive and therapeutic agents against SARS-CoV-2.
  • To discuss the pathophysiology of the immune response to SARS-CoV-2 infection.
  • To emphasize the need for sustained surveillance and research for pandemic preparedness.

Main Methods:

  • Literature review of SARS-CoV-2 research.
  • Analysis of the impact of viral and host factors on COVID-19.
  • Summary of current preventive and therapeutic strategies.

Main Results:

  • Key structural proteins and immune response insights enabled vaccine and therapeutic development.
  • Antivirals (e.g., remdesivir) inhibit viral replication.
  • Immunomodulatory agents (e.g., tocilizumab) reduce immune dysregulation.

Conclusions:

  • Continued research and robust surveillance are essential for managing SARS-CoV-2.
  • Preparedness for emerging pathogens with pandemic potential is critical.