Influenza

Influenza (the flu) is a contagious respiratory illness caused by influenza viruses. It can cause mild to severe illness, and at times can lead to death. The best way to prevent the flu is by getting a flu vaccination each year. Every year in the United States, on average 5% to 20% of the population gets the flu; more than 200,000 people are hospitalized from flu complications, and; about 36,000 people die from flu-related causes. Some people, such as older people, young children, and people with certain health conditions, are at high risk for serious flu complications.

Types of Influenza

Influenza is caused by three types of RNA viruses called influenza types A, B and C, which all belong to the family Orthomyxoviridae.

Influenza Immunization

Influenza Epidemiology

Influenza Prognosis

Influenza Symptoms

Influenza Treatments

Influenza Pandemics

Influenza Research

Influenza Infection in Animals

Should I get the Flu Shot?

Latest Influenza News and Research

New approach to combat influenza and herpes with bean-based gum

In today's interconnected world, infectious diseases pose an escalating threat, as demonstrated by the coronavirus pandemic and outbreaks of H1N1, SARS, Ebola, Zika, and H5N1 (bird flu) viruses-all of which have had significant global health and economic impacts.

4 Apr 2025

Rutgers researchers develop promising new oral antiviral for COVID-19

Rutgers Health researchers have developed an oral antiviral drug candidate for COVID-19 that could overcome major limitations of Paxlovid, currently the most prescribed oral treatment.

3 Apr 2025

Annual COVID-19 boosters crucial for immunocompromised individuals

New research findings provide solid evidence that annual COVID-19 vaccine booster doses continue to be advisable for certain immunocompromised people, researchers at McGill University say.

1 Apr 2025

UTA expert discusses the latest developments of measles outbreak in Texas

Measles is a highly contagious disease that was declared eliminated from the U.S. by the World Health Organization 25 years ago due to the success of vaccination efforts.

28 Mar 2025

Scientists develop universal vaccine targeting multiple coronaviruses

Sugar coatings aren't only for candies; they also help viruses, like the ones that cause COVID-19, hide from their hosts' immune system.

25 Mar 2025

UZH researchers develop decoy molecules to restore immune defense

An immune system defect makes affected individuals vulnerable to severe viral diseases such as influenza or COVID-19. It is caused by the body's own antibodies, which inhibit important defense proteins known as type I interferons.

24 Mar 2025

How your diet and probiotics can improve vaccine effectiveness

Researchers uncover how probiotics and diet shape the gut microbiome to boost vaccine efficacy, offering new avenues for precision immunization.

23 Mar 2025

Registration Now Open for World Vaccine Congress Washington 2025: Leading Experts from Government, WHO, CEPI, and more to Speak

Register for the World Vaccine Congress 2025, the premier event for vaccine experts and leaders, driving innovations in public health and pandemic preparedness.

From World Vaccine Congress Washington 21 Mar 2025

Current antivirals not successful in treating severe H5N1 bird flu infections

As the H5N1 avian influenza outbreak continues, scientists are working to better understand the virus's threat to human health.

17 Mar 2025

U.S. consumers still unaware of raw milk risks despite bird flu findings

Although the Food and Drug Administration (FDA) located H5N1 bird flu virus in samples of raw, or unpasteurized, milk in tests in four states in April 2024, and bird flu has been detected in commercially sold raw milk, many Americans do not know that consuming raw milk and its products poses greater health risks than consuming pasteurized milk and its products, especially for children.

14 Mar 2025

Breakthrough peptide inhibitor effective against multiple SARS-CoV-2 variants

SARS-CoV-2, the virus responsible for COVID-19, infects cells by binding its spike protein to angiotensin-converting enzyme 2 (ACE2) receptors.

14 Mar 2025

Older adults may have stronger immunity to bird flu, Penn study finds

Prior exposures to specific types of seasonal influenza viruses promote cross-reactive immunity against the H5N1 avian influenza virus, according to new research from the Perelman School of Medicine at the University of Pennsylvania.

13 Mar 2025

COVID-19 discovery could open the door to new treatments for chronic lung diseases

University of Virginia School of Medicine scientists have discovered how severe COVID-19 can destroy immune cells' ability to repair the lungs, helping explain the lingering effects of long COVID.

13 Mar 2025

Updates on influenza vaccine strain recommended by WHO (2025-2026 northern hemisphere)

To maintain vaccine efficacy, WHO regularly updates influenza vaccine strains based on global epidemiological, virological, and serological analyses.

From Sino Biological Inc. 12 Mar 2025

Many parents uncertain about bird flu information and risks, poll suggests

With soaring egg prices and ongoing bird flu headlines, many parents are uncertain about the risks and facts surrounding the virus, a national poll suggests.

10 Mar 2025

MRNA vaccines, once a Trump boast, now face attacks from some in GOP

Researchers racing to develop bird flu vaccines for humans have turned to a cutting-edge technology that enabled the rapid development of lifesaving covid shots.

10 Mar 2025

New sensor offers rapid detection of airborne bird flu virus

Recent outbreaks of highly pathogenic avian influenza (also known as bird flu) have created a need for rapid and sensitive detection methods to mitigate its spread.

7 Mar 2025

Eradivir begins Phase 2 challenge study for antiviral therapeutic EV25

Eradivir, a clinical-stage small molecule immunotherapy biotech company, announced it has begun a Phase 2 challenge study with its antiviral therapeutic, EV25. The study will provide safety and efficacy data gathered from otherwise healthy participants infected with influenza then later treated with EV25.

7 Mar 2025

Researchers uncover how antibodies protect against Strep A infections

Researchers have discovered how antibodies help to protect against contagious bacterial infections caused by Strep A, including strep throat.

7 Mar 2025

New antibody pair could defeat all SARS-CoV-2 variants

A Stanford-led team has found two antibodies that can work together to defeat all SARS-CoV-2 variants. More research is needed, but the approach could help in the development of treatments to keep pace with evolving viruses.

6 Mar 2025