Pfizer class action lawsuit overview:
- Who: Plaintiff Paul Nakamura filed a class action lawsuit against Pfizer Inc.
- Why: Nakamura claims Pfizer unlawfully tracked and shared users’ website activity with third parties even after users declined cookies and tracking tools.
- Where: The class action lawsuit was filed in New York federal court.
Pfizer faces a new class action lawsuit alleging it secretly tracked users’ activity on its website and shared their information with third-party advertising and analytics companies despite promising users they could opt out of tracking technologies.
Plaintiff Paul Nakamura claims Pfizer’s website used cookies and other tracking tools to collect and transmit users’ browsing activity, device identifiers, search activity and other personal information to companies, including Google.
According to the complaint, Pfizer’s website displayed a privacy banner and cookie preference settings that represented users could reject nonessential tracking by selecting “Decline All” or disabling optional analytics and marketing cookies.
However, the class action lawsuit alleges the website began deploying tracking tools immediately when users visited the site, before they could interact with the privacy banner or manage cookie settings.
The complaint further claims Pfizer continued transmitting users’ information to third-party tracking companies even after users expressly rejected tracking and nonrequired cookies.
Pfizer allegedly shared browsing activity with Google tracking tools
Nakamura says Pfizer integrated tracking technologies associated with Google Ads and Google DoubleClick into its website to monitor user activity and support advertising and analytics efforts.
The class action lawsuit alleges the tracking tools intercepted information, including pages users viewed, links clicked, browsing activity, device and browser information, approximate geolocation data and other identifiers that allegedly allowed users to be tracked across sessions and websites.
Nakamura, a California resident, says he visited Pfizer’s website in July 2025 to research information about COVID-19 vaccines and selected the “Decline All” option in Pfizer’s privacy banner because he routinely rejects tracking technologies.
Despite opting out, the class action lawsuit claims Pfizer still deployed tracking tools that intercepted and transmitted his browsing activity and related metadata to third parties.
The complaint accuses Pfizer of violating the federal Wiretap Act, California privacy laws, California consumer protection statutes and common law privacy protections.
Nakamura seeks to represent a nationwide class of users who visited Pfizer’s website, interacted with the privacy banner or cookie settings and did not affirmatively accept tracking tools during the applicable limitations period.
Meanwhile, Southern Illinois Healthcare recently agreed to a class action settlement resolving claims it violated privacy laws by using tracking pixels on its website.
What do you think about the claims in this Pfizer data privacy lawsuit? Let us know in the comments.
The plaintiff is represented by Mark S. Reich and Mark Jensen of Levi & Korsinsky LLP.
The Pfizer class action lawsuit is Nakamura v. Pfizer Inc., Case No. 1:26-cv-03914, in the U.S. District Court for the Southern District of New York.
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