Back to Top Skip to main content

Influenza Seasonal

2018-19 Seasonal Influenza Resource Center

Flu disease picture  Influenza is a highly contagious viral infection. There are three main antigen types of influenza: types A, B, and C. Influenza type A causes moderate to severe illness and affects all age groups. Type A can infect both humans and animals. The notion that influenza type B generally causes milder disease than type A has been recently challenged and is more fatal in children. Type B mainly infects humans. Influenza type C only causes mild respiratory illness. Influenza activity peaks from December to March in the Northern Hemisphere.

Influenza is transmitted from person to person mainly when an infected person coughs or sneezes. Transmission can also occur from direct contact with respiratory secretions, such as when touching surfaces contaminated with influenza virus and then touching the eyes, nose, or mouth, or from indirect contact with droplets from coughs or sneezes. Transmission can occur from the day before symptoms begin until about 5 days after symptoms begin in adults, or up to 10 days or more after symptoms begin in children.

About 50% of infected persons will develop "classic" influenza disease. This is characterized by the abrupt onset of fever, muscle pain, sore throat, nonproductive cough, runny nose, and headache. These symptoms generally last from 2 to 3 days. However, some people may experience a loss of strength or energy for several weeks. In addition, some people may develop complications, such as pneumonia.

Source: Centers for Disease Control and Prevention

You also may be interested in...

Update: Influenza Activity — United States, September 30, 2018–February 2, 2019

Report
2/15/2019

As of February 2, 2019, this has been a low-severity influenza season, with a lower percentage of outpatient visits for influenza-like illness (ILI), lower rates of hospitalization, and fewer deaths attributed to pneumonia and influenza, compared with recent seasons.

Recommended Content:

Influenza Seasonal

Interim Estimates of 2018–19 Seasonal Influenza Vaccine Effectiveness — United States, February 2019

Report
2/15/2019

The overall estimated effectiveness of 2018-2019 seasonal influenza vaccine for preventing medically attended, laboratory-confirmed influenza virus infection was 47 percent.

Recommended Content:

Influenza Seasonal

(ARMY MESSAGE ONLY) MMQC-19-1199 2019-2020 Influenza Virus Vaccine - Call for Requirements/Suspense 28 FEB 2019

Publication
1/31/2019

Army Medical Treatment Facilities (MTFs) are required to provide their influenza (flu) vaccine requirements for the upcoming season by February 28, 2019.

Recommended Content:

Influenza Seasonal

QuickStats: Percentage of Adults Aged 18–64 Years Who Had an Influenza Vaccination in the Past 12 Months, by Sex and Current Asthma Status — National Health Interview Survey, 2017

Report
1/18/2019

In 2017, adults aged 18–64 years with current asthma were more likely to have had an influenza vaccination in the past 12 months (47.9%) than those without asthma (36.4%).

Recommended Content:

Influenza Seasonal

QuickStats: Percentage of Adults Aged ≥18 Years Who Had an Influenza Vaccination in the Past 12 Months, by Diagnosed Diabetes Status and Age Group — National Health Interview Survey, 2017

Report
12/14/2018

Those with a diagnosis of diabetes were more likely to have had an influenza vaccination in the past 12 months than those with a diagnosis of prediabetes; those with no diagnosed diabetes were the least likely to have had an influenza vaccination.

Recommended Content:

Influenza Seasonal

QuickStats: Percentage of U.S. Adults Aged ≥18 Years Who Have Had a Flu Vaccination in the Past 12 Months, by Sex and Age Group — National Health Interview Survey, 2017

Report
11/30/2018

Overall, 46.7 percent of women and 39.9 percent of men age 18 years or older have had a flu vaccination in the past 12 months.

Recommended Content:

Influenza Seasonal

Update: Influenza Activity — United States and Worldwide, May 20–October 13, 2018

Report
10/26/2018

In the United States, reported influenza activity was low in all regions, typical for this time of year. Fourteen influenza variant virus infections were reported in the U.S., and most were associated with exposure to swine.

Recommended Content:

Influenza Seasonal

Influenza Vaccine Product List and Age Groups 2018-19

Publication
10/24/2018

A list of available influenza vaccines, how they are supplied, age indications, and other information.

Recommended Content:

Influenza Seasonal

FDA Approval for Afluria Age Expansion

Publication
10/4/2018

Afluria quadrivalent and trivalent influenza vaccines are now indicated for use in persons 6 through 59 months of age. The previous indication was for 5 years and older.

Recommended Content:

Influenza Seasonal

Influenza Vaccination Coverage Among Health Care Personnel — United States, 2017–18 Influenza Season

Report
9/28/2018

A CDC survey showed 78.4% of health care personnel reported receiving influenza vaccination during the 2017–18 season, similar to reported coverage in the previous four influenza seasons.

Recommended Content:

Influenza Seasonal

Influenza and Tdap Vaccination Coverage Among Pregnant Women — United States, April 2018

Report
9/28/2018

During the 2017–18 influenza season, 49.1% of pregnant women received influenza vaccination before or during pregnancy, 54.4% of women with a live birth received Tdap during pregnancy, and 32.8% received both recommended vaccines.

Recommended Content:

Influenza Seasonal | Tetanus-Diphtheria-Pertussis | Pregnancy Information

Operational Infectious Diseases Weekly Update - 2018 Week 38

Publication
9/27/2018

A one-page weekly snapshot of current febrile respiratory illness and acute gastroenteritis surveillance at select DoD sites, meant to centralize all Naval Health Research Center surveillance work into one, user-friendly report.

Recommended Content:

Adenovirus | Influenza Seasonal | Accession Screening and Immunization Program

Operational Infectious Diseases Weekly Update - 2018 Week 37

Publication
9/20/2018

A one-page weekly snapshot of current febrile respiratory illness and acute gastroenteritis surveillance at select DoD sites, meant to centralize all Naval Health Research Center surveillance work into one, user-friendly report.

Recommended Content:

Adenovirus | Influenza Seasonal | Accession Screening and Immunization Program

2018-2019 COAST GUARD OIX ANNUAL INFLUENZA (FLU) IMMUNIZATION PROGRAM

Policy

Coast Guard medical guidance for the 2018-19 influenza season and its influenza immunization program.

Operational Infectious Diseases Weekly Update - 2018 Week 36

Publication
9/13/2018

A one-page weekly snapshot of current febrile respiratory illness and acute gastroenteritis surveillance at select DoD sites, meant to centralize all Naval Health Research Center surveillance work into one, user-friendly report.

Recommended Content:

Adenovirus | Influenza Seasonal | Accession Screening and Immunization Program
<< < 1 2 3 4 5  ... > >> 
Showing results 1 - 15 Page 1 of 11

DHA Address: 7700 Arlington Boulevard | Suite 5101 | Falls Church, VA | 22042-5101

Some documents are presented in Portable Document Format (PDF). A PDF reader is required for viewing: Download a PDF Reader or learn more about PDFs.