CDC: Flu Vaccine 36 Percent Effective So Far

The vaccine shows better-than-expected effectiveness against the most common and most virulent strain of influenza in children under 9 years old.

Written byCatherine Offord
| 2 min read

Register for free to listen to this article
Listen with Speechify
0:00
2:00
Share

ISTOCK, SCYTHER5This year’s influenza vaccine has been 36 percent effective against the flu, according to a report released Thursday (February 15) by the US Centers for Disease Control and Prevention (CDC). When considering only protection against H3N2—the most common, and most virulent, strain of influenza—that effectiveness dropped to 25 percent.

The 2017-2018 flu season has been particularly brutal so far. Already 63 children have died—three-quarters of whom were not vaccinated, according to CDC officials (via CNN). And more than two-thirds of flu cases have been caused by the H3N2 strain, which is “often linked to more severe illness,” CDC Director Anne Schuchat tells CNN.

Scott Gottlieb, the commissioner of the US Food and Drug Administration (FDA), noted in a statement released on Thursday that, “it has been an especially challenging season, with high rates of hospitalization for both influenza and its complications. . . . Many schools have closed in an attempt to control the spread of the illness and doctors’ offices are packed with patients seeking diagnosis and antiviral treatment.”

This season’s vaccine was ...

Interested in reading more?

Become a Member of

The Scientist Logo
Receive full access to more than 35 years of archives, as well as TS Digest, digital editions of The Scientist, feature stories, and much more!
Already a member? Login Here

Related Topics

Meet the Author

  • After undergraduate research with spiders at the University of Oxford and graduate research with ants at Princeton University, Catherine left arthropods and academia to become a science journalist. She has worked in various guises at The Scientist since 2016. As Senior Editor, she wrote articles for the online and print publications, and edited the magazine’s Notebook, Careers, and Bio Business sections. She reports on subjects ranging from cellular and molecular biology to research misconduct and science policy. Find more of her work at her website.

    View Full Profile
Share
Illustration of a developing fetus surrounded by a clear fluid with a subtle yellow tinge, representing amniotic fluid.
January 2026

What Is the Amniotic Fluid Composed of?

The liquid world of fetal development provides a rich source of nutrition and protection tailored to meet the needs of the growing fetus.

View this Issue
Human-Relevant In Vitro Models Enable Predictive Drug Discovery

Advancing Drug Discovery with Complex Human In Vitro Models

Stemcell Technologies
Redefining Immunology Through Advanced Technologies

Redefining Immunology Through Advanced Technologies

Ensuring Regulatory Compliance in AAV Manufacturing with Analytical Ultracentrifugation

Ensuring Regulatory Compliance in AAV Manufacturing with Analytical Ultracentrifugation

Beckman Coulter Logo
Skip the Wait for Protein Stability Data with Aunty

Skip the Wait for Protein Stability Data with Aunty

Unchained Labs

Products

Sino Biological Logo

Sino Biological's Launch of SwiftFluo® TR-FRET Kits Pioneers a New Era in High-Throughout Kinase Inhibitor Screening

SPT Labtech Logo

SPT Labtech enables automated Twist Bioscience NGS library preparation workflows on SPT's firefly platform

nuclera logo

Nuclera eProtein Discovery System installed at leading Universities in Taiwan

Brandtech Logo

BRANDTECH Scientific Introduces the Transferpette® pro Micropipette: A New Twist on Comfort and Control