Influenza

Avian Flu Update–Continued Spread and Flu Vaccine Development

As bird flu cases in humans slowly rise, learn about what’s being done to curb the spread.
Read the latest avian flu updates
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Read the latest avian flu updates

Latest Articles

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Flu Season

2024-2025 Flu Vaccine Effectiveness: What Do We Know?

How well may flu vaccines protect us from flu this season?
Dec 19, 2024
Some effectiveness data is now available
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Vaccines

Is It Too Late to Get a Flu Shot?

If you haven’t gotten a flu shot earlier in the flu season, is it worth bothering to get one at all?
Jan 2, 2025
Learn about getting a flu shot in late flu season
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Vaccines

National Influenza Vaccination Week: Get a Flu Shot Before the Holidays

National Influenza Vaccination Week in early December is a good time to get a flu shot.
Dec 2, 2024
Learn why
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Flu

Avian Flu in Humans: New Cases in California, Washington, and Missouri

Several human cases of avian flu have been confirmed in California and Washington, with a new case in Missouri.
Nov 26, 2024
Read the latest updates
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Flu Test

Getting a Flu Test

Mar 24, 2025
Learn more about flu testing
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Flu

Pediatric Deaths From Flu in 2023–2024 Highest in 14 Years

Last flu season, 202 children died from flu-related illness.
Nov 12, 2024
Learn how children are at risk of flu
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Flu Season

2024-2025 Flu Season Predictions: A Second Peak of Flu Cases

Flu seasons are never quite the same from year to year.
Dec 9, 2024
Read how predictions for this flu season are turning out

Interactive Influenza Timeline

Influenza

The History of Influenza

How influenza led to pandemics, health crises, scientific discoveries, vaccine innovations and disease prevention.

Facts About Flu Vaccines

Vaccines

Overview of Flu Vaccine Types

There are a range of choices among the vaccines available today.

Masked female receiving a flu shot in the arm

Recent Flu Season Updates

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Vaccines

Flu Vaccine and Vaccination Recommendations for Flu Season 2024–2025

What changes to flu vaccines and vaccination recommendations can we expect this flu season?

Read about updates for flu season 2024–2025
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Vaccines

A Change Is Coming to Flu Vaccines: Moving From Quadrivalent Flu Vaccines to Trivalent

Current flu vaccines are quadrivalent, designed to protect against 4 viruses...but this will soon change.

Learn what's changing and why
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Vaccines

How Effective Is the Flu Vaccine? See Early Estimates for 2023-2024

The flu shot is still the best way to prevent the flu and its complications. But how effective were flu vaccines this season?

Read about flu vaccine effectiveness in 2023-2024
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Flu Season

The 2023-2024 Flu Season in Review: Have Flu Cases Peaked in the U.S.?

Flu cases in the U.S. are declining, but can we say the 2023-2024 flu season is wrapping up?

Read an update about flu activity this season
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Flu Season

2023-2024 Flu Season Predictions: What Can We Expect?

Annual flu season patterns and trends have been in continual flux since 2020.

See what may be in store for the 2023-2024 flu season
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Vaccines

Updated Flu Vaccine Recommendations for the 2023-2024 Flu Season

Flu vaccination recommendations are updated each year. See what's new for the 2023-2024 flu season.

Read about this year's flu season vaccination recommendations