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Related Concept Videos

Vaccinations01:51

Vaccinations

53.5K
Overview
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Vaccines01:21

Vaccines

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Vaccines are among the most effective tools in preventive medicine, designed to prepare the immune system to recognize and combat infectious agents. By introducing antigens—substances that the immune system identifies as foreign—vaccines stimulate an adaptive immune response that leads to immunological memory. This immunological memory enables the body to mount a faster and more effective response upon future exposures to the actual pathogen.Vaccines can be categorized based on the...
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Infectious Diseases and Their Occurrence01:28

Infectious Diseases and Their Occurrence

31
Infectious diseases appear in populations through various transmission patterns, influenced by pathogen characteristics, population immunity, environmental conditions, and social behavior. Understanding these patterns is essential for effective public health surveillance and intervention. These categories—sporadic, outbreak, epidemic, pandemic, and endemic—help frame the nature and scope of disease events.Sporadic diseases occur irregularly and infrequently, without a predictable...
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Cholera01:25

Cholera

39
Cholera is an acute gastrointestinal disease caused by the Gram-negative bacterium Vibrio cholerae. It is transmitted primarily via the fecal-oral route through the ingestion of contaminated water or food.Vibrio cholerae is a motile, Gram-negative bacterium of the family Vibrionaceae, primarily associated with waterborne outbreaks in areas with inadequate sanitation. Although over 200 serogroups of V. cholerae exist, only O1 and O139 are responsible for epidemic cholera. The O1 serogroup,...
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Investigation of Disease Outbreaks01:23

Investigation of Disease Outbreaks

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Multistate foodborne outbreaks pose significant public health risks and require meticulous investigation to identify sources and implement control measures. The Centers for Disease Control and Prevention (CDC) utilizes a dynamic seven-step process for these investigations, integrating data from laboratories, interviews, and environmental assessments to protect public health.Outbreak Detection: The detection of multistate outbreaks typically begins with PulseNet, the CDC's national laboratory...
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Sexually Transmitted Infections01:26

Sexually Transmitted Infections

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Sexually transmitted infections (STIs) are diseases transmitted primarily through unsafe sexual interactions. Bacteria, viruses, or parasites cause them and can result in severe health complications if untreated.ChlamydiaThe bacterium Chlamydia trachomatis is responsible for the disease Chlamydia, the most common STI in the United States. This peculiar pathogen requires human cells to reproduce, residing intracellularly. The initial infection often goes unnoticed because it typically does not...
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Related Experiment Video

Updated: Mar 24, 2026

Particle Agglutination Method for Poliovirus Identification
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Particle Agglutination Method for Poliovirus Identification

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So close: remaining challenges to eradicating polio.

Michael J Toole1

  • 1Burnet Institute, 85 Commercial Rd, Melbourne, 3004, Australia. toole@burnet.edu.au.

BMC Medicine
|March 15, 2016
PubMed
Summary

The Global Polio Eradication Initiative is nearing its goal, with wild poliovirus cases confined to Afghanistan and Pakistan. Overcoming insecurity and vaccine hesitancy are key to eradicating polio worldwide.

Area of Science:

  • Public Health
  • Epidemiology
  • Infectious Diseases

Background:

  • The Global Polio Eradication Initiative (GPEI) has made significant progress since its 1988 launch.
  • Wild poliovirus cases were reported in only two countries in 2015, and Africa has been polio-free for over 18 months.

Purpose of the Study:

  • To summarize the current epidemiology of wild and vaccine-derived poliovirus.
  • To describe the remaining challenges and innovative strategies for global polio eradication.

Main Methods:

  • Review of epidemiological data on wild and vaccine-derived poliovirus cases in 2015.
  • Analysis of barriers to polio eradication, including insecurity and vaccine hesitancy.

Main Results:

  • In 2015, wild poliovirus was endemic only in Afghanistan and Pakistan.
Keywords:
EliminationEradicationPolioPoliomyelitisPoliovirus

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  • Vaccine-derived poliovirus circulated in several countries, with 28 cases reported.
  • Barriers include insecurity in endemic regions and public resistance to vaccination.

    • Conclusions:

    • Global polio eradication is achievable but faces significant challenges.
    • Addressing insecurity, vaccine hesitancy, and vaccine-derived poliovirus is crucial for success.