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Related Concept Videos

Influenza01:27

Influenza

37
Influenza is an acute, highly communicable viral disease that affects the respiratory tract and is responsible for seasonal epidemics worldwide. Influenza A is the most prevalent type associated with widespread outbreaks and is subtyped based on two surface glycoproteins: hemagglutinin (H) and neuraminidase (N), as in H1N1. These glycoproteins are essential for viral infectivity, transmission, and immune recognition. Transmission occurs primarily through respiratory droplets and contaminated...
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Vaccinations01:51

Vaccinations

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Infectious Diseases and Their Occurrence01:28

Infectious Diseases and Their Occurrence

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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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Update: Influenza Activity - United States.

Sophie Smith1, Lenee Blanton, Krista Kniss

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Influenza activity in the U.S. was low in fall 2015, with Influenza A (H3) viruses being the most common. The Centers for Disease Control and Prevention (CDC) monitored these trends.

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Area of Science:

  • Public Health
  • Epidemiology
  • Virology

Background:

  • The Centers for Disease Control and Prevention (CDC) conducts year-round surveillance of influenza activity in the United States.
  • Influenza seasons typically span fall, winter, and spring, with variations in timing and intensity based on location and specific viruses.
  • Understanding influenza trends is crucial for public health preparedness and response.

Purpose of the Study:

  • To summarize U.S. influenza activity from early October to late November 2015.
  • To identify the predominant influenza virus strains circulating during this period.

Main Methods:

  • The CDC collected and compiled surveillance data on influenza activity.
  • Data analysis focused on identifying the types and subtypes of influenza viruses detected.
  • Geographic and temporal trends in influenza activity were monitored.

Main Results:

  • Overall influenza activity in the United States was low during October and November 2015.
  • Influenza A viruses were the most frequently identified.
  • Influenza A (H3) viruses were the predominant subtype circulating during the surveillance period.

Conclusions:

  • The early influenza season of 2015 was characterized by low activity.
  • The predominance of Influenza A (H3) suggests a potential impact on vulnerable populations.
  • Continued surveillance is essential for tracking influenza virus evolution and informing public health interventions.