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Viral Mutations00:36

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A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material...
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Stages of Infection01:26

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Stages of infection describe what happens to a susceptible host once a pathogen invades the human body. The stages of infection are incubation, prodromal, illness, stage of decline, and convalescence. The incubation stage is the period from exposure to a pathogen until symptoms start. The infected person is unaware of impending illness as the pathogens grow and multiply within the body. The duration may vary depending on the type of infection. The incubation period of measles averages ten to...
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Principles of Disease Surveillance01:26

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Disease surveillance is the systematic collection, analysis, and interpretation of health data essential to the planning, implementation, and evaluation of public health practice. This process integrates data dissemination to entities responsible for preventing and controlling disease, injury, and disability. Surveillance systems provide crucial information for action, helping public health authorities make informed decisions to manage and prevent outbreaks, ensure public safety, optimize...
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Controls in Experiments01:13

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When conducting an experiment, it is crucial to have control to reduce bias and accurately measure the dependent variables. It also marks the results more reliable. Controls are elements in an experiment that have the same characteristics as the treatment groups but are not affected by the independent variable. By sorting these data into control and experimental conditions, the relationship between the dependent and independent variables can be drawn. A randomized experiment always includes a...
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Transmission-based Precautions I: Contact, Enteric, and Droplets01:17

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Transmission-based precautions are for patients known to be infected or suspected to be infected or colonized with organisms that pose a significant risk to others. Some transmission-based precautions include contact, enteric, and droplet.
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Single Nucleotide Polymorphisms-SNPs01:05

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A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
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Author Spotlight: Advancements in Multiplex Detection of Respiratory Viruses
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The COVID-19: Current understanding.

Shweta Tripathi1, Mayukh Mani Tripathi2

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The COVID-19 pandemic, caused by the SARS-CoV-2 virus, spread globally from China in late 2019. This review covers COVID-19 epidemiology, symptoms, diagnosis, and management strategies.

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Area of Science:

  • Infectious Diseases
  • Public Health
  • Virology

Background:

  • The emergence of a novel coronavirus disease, COVID-19, was first reported in Wuhan, China, in December 2019.
  • The virus responsible, severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2), rapidly disseminated globally, leading to a pandemic.
  • Understanding the transmission routes, including inhalation of respiratory droplets and contact with contaminated surfaces, is crucial.

Purpose of the Study:

  • To provide a comprehensive overview of the latest information regarding COVID-19.
  • To detail the epidemiology, clinical manifestations, and management of COVID-19.
  • To summarize current knowledge on SARS-CoV-2, including its origins.

Main Methods:

  • This study is a review of existing literature and data on COVID-19.
  • Information was gathered on epidemiological trends, clinical symptoms, and diagnostic methods.
  • Management strategies and the history of SARS-CoV-2 were also compiled.

Main Results:

  • Common symptoms include fever, dry cough, dyspnea, fatigue, chest pain, and myalgia.
  • Real-time polymerase chain reaction (RT-PCR) is a key diagnostic tool, utilizing various sample types.
  • Early diagnosis, isolation, and supportive care are vital for patient outcomes.

Conclusions:

  • COVID-19 presents with a range of symptoms and requires prompt identification and management.
  • Continued research into SARS-CoV-2 and its impact is essential for public health.
  • Effective control measures rely on understanding transmission dynamics and implementing supportive care.