GlaxoSmithKline Boostrix class action settlement

GlaxoSmithKline (GSK) agreed to a class action settlement to resolve claims its “Big Bad Cough” advertising campaign misled viewers about Boostrix’s ability to prevent whooping cough.

The Boostrix class action settlement benefits adults who viewed the “Big Bad Cough” advertising campaign and either lived in New York at the time or were vaccinated with Boostrix in New York between May 20, 2016, and May 20, 2020.

The “Big Bad Cough” advertising campaign ran between 2015 and 2020 and featured advertisements with humanized wolves to promote the GSK vaccine Boostrix. Boostrix is a tetanus, diphtheria and whooping cough vaccine.

According to a class action lawsuit, the “Big Bad Cough” campaign misled consumers about Boostrix’s ability to prevent whooping cough from spreading to others. Plaintiffs in the case say they would not have purchased the pertussis vaccination if they had known the truth.

GSK has not admitted any wrongdoing but agreed to pay an undisclosed sum to resolve the allegations.

Class members can receive a cash payment from the Boostrix class action settlement.

Class members who provide proof of vaccination can receive a payment of $50. Those who do not provide proof of vaccination but submit an attestation of vaccination can receive a payment of $10.

The deadline for exclusion and objection is May 11, 2026.

The final approval hearing for the GSK Boostrix settlement is scheduled for July 2, 2026.

To receive settlement benefits, class members must submit a valid claim form by June 8, 2026.

Who’s Eligible

The class action settlement benefits individuals who viewed GlaxoSmithKline’s “Big Bad Cough” advertising campaign between May 20, 2016, and May 20, 2020, and either lived in New York at the time or were vaccinated with Boostrix in New York.

Potential Award

$50 with qualifying proof of vaccination; $10 without qualifying proof of vaccination

Proof of Purchase

Qualifying proof of vaccination includes a copy of a vaccination record that must include the name of the person vaccinated, the date of the vaccination and the name of the vaccine. An attestation of vaccination is a signed statement that the individual was vaccinated with Boostrix during the class period and that the information provided on the claim form is true and correct.

Claim Form

NOTE: If you do not qualify for this settlement do NOT file a claim.

Remember: you are submitting your claim under penalty of perjury. You are also harming other eligible Class Members by submitting a fraudulent claim. If you’re unsure if you qualify, please read the FAQ section of the Settlement Administrator’s website to ensure you meet all standards (Top Class Actions is not a Settlement Administrator). If you don’t qualify for this settlement, check out our database of other open class action settlements you may be eligible for.

Claim Form Deadline

06/08/2026

Case Name

DeCostanzo v. GlaxoSmithKline PLC, et al., Case 2:21-cv-04869-NJC-AYS, in the United States District Court for the Eastern District of New York

Final Hearing

07/02/2026

Settlement Website

BigBadCoughSettlement

Claims Administrator

Big Bad Cough Settlement
c/o Settlement Administrator
1650 Arch Street, Suite 2210
Philadelphia, PA 19103
[email protected]
833-978-4147

Class Counsel

Aaron Siri
Elizabeth A. Brehm
Mason A. Barney
Michael P. Connett
SIRI & GLIMSTAD LLP

Defense Counsel

J. Gordon Cooney Jr.
Natalie Georges
Grant R. MacQueen
MORGAN, LEWIS & BOCKIUS LLP