In re: Merck Mumps Vaccine Antitrust Litigation v.

Court of Appeals for the Third Circuit·Decided October 7, 2024·No. 23-3089·Unpublished

Opinion

NOT PRECEDENTIAL

UNITED STATES COURT OF APPEALS FOR THE THIRD CIRCUIT

No. 23-3089

IN RE: MERCK MUMPS VACCINE ANTITRUST LITIGATION

MERCK & CO., INC.,

Appellant

On Appeal from the United States District Court for the Eastern District of Pennsylvania (D.C. Civil Action No. 2-12-cv-03555)

District Judge: Honorable Chad F. Kenney

Argued July 9, 2024

Before: SHWARTZ, PHIPPS, and MONTGOMERY-REEVES, Circuit Judges.

(Opinion filed: October 7, 2024)

Jessica L. Ellsworth [ARGUED] Kristina Alekseyeva Neal K. Katyal Danielle D. Stempel Michael J. West Hogan Lovells US 555 Thirteenth Street NW Columbia Square Washington, DC 20004

Lisa C. Dykstra R. Brendan Fee Zachary M. Johns Morgan Lewis & Bockius 2222 Market Street, 12th Floor

Philadelphia, PA 19103

Sally W. Bryan Kathleen Hardway Dino S. Sangiano Venable LLP 750 E. Pratt Street, Suite 900 Baltimore, MD, 21202

Counsel for Appellant Merck & Co, Inc.

Jonathan Edelman Kellie Lerner Laura Song Robins Kaplan 1325 Avenue of the Americas, Suite 2601 New York, NY 10019

Deepak Gupta [ARGUED] Gupta Wessler 2001 K Street NW, Suite 850 North Washington, DC 20006

Jeffrey L. Kodroff John A. Macoretta Dianna J. Zinser Spector Roseman & Kodroff 2001 Market Street, Suite 3420 Philadelphia, PA 19103

Counsel for Appellees Chatom Primary Care PC, on behalf of itself and all others similarly situated; Dr. Andrew Klein; & John Ivan Sutter, M.D.

OPINION

 This disposition is not an opinion of the full Court and pursuant to I.O.P. 5.7 does not constitute binding precedent.

MONTGOMERY-REEVES, Circuit Judge.

Antitrust law does not bar regulated parties from petitioning the government. And a petition is not a sham merely because it seeks and obtains a selfish result.

In the late 1990s, the Food & Drug Administration (the “FDA”) approached Merck & Co, Inc. (“Merck”) with concerns about the end-of-shelf-life potency of its mumps vaccine, the sole licensed mumps vaccine available in the United States. At the FDA’s suggestion, Merck boosted the initial potency of its vaccine, presumably with the hope that increasing beginning-of-shelf-life potency would increase end-of-shelf-life potency too. This fix did not work. But Merck did not reveal that failing to the FDA because Merck was concerned that diminishing the relevant drug-label claims could hasten the arrival of competition by lowering the regulatory bar that a competitor would need to clear to show that its mumps vaccine was not inferior to Merck’s, an apparent prerequisite for FDA approval. So rather than reveal that its vaccine might be misbranded, Merck allegedly (1) concealed its ongoing potency problems, (2) ran a flawed clinical trial, and (3) relied on that unreliable data to persuade the FDA to license a less potent vaccine.

Appellees are a collection of physicians and physicians’ groups who filed a class-

action lawsuit alleging that they bought Merck’s mumps vaccines at inflated prices. Among other things, their complaint alleges that Merck unlawfully extended its apparent monopoly by making false drug-label claims with the goal of thwarting competition, in violation of § 2 of the Sherman Act, 15 U.S.C. § 2. After lengthy discovery, Merck moved for summary judgment on a few grounds, including that the Noerr-Pennington

doctrine purportedly shielded Merck from liability under the Sherman Act because the asserted harm to competition flowed from Merck’s genuine and successful petitioning of the FDA. The District Court rejected Merck’s motion for summary judgment on the antitrust claim and granted Merck’s request to file an interlocutory appeal under 28 U.S.C. § 1292(b). This appeal followed.

The record contains troubling evidence that Merck sought to extend its apparent monopoly by misrepresenting facts about its mumps vaccines on the FDA-approved drug labeling. But those allegedly false claims were the result of Merck’s genuine and successful petitioning of the FDA. And Noerr-Pennington immunity is not vitiated “simply because [the relevant petitioning] . . . ha[d] a commercial impact and involve[d] conduct that can be termed unethical.” E. R.R. Presidents Conf. v. Noerr Motor Freight, 365 U.S. 127, 141 (1961). Thus, there is no genuine dispute of material fact that Noerr- Pennington immunity attaches to Merck’s alleged anticompetitive scheme. And we will reverse-in-part the District Court’s order denying summary judgment.

I. BACKGROUND1 Because Merck moved for summary judgment, the following recitation of the facts resolves all disputes and draws all reasonable inferences in Appellees’ favor. Physicians Healthsource, Inc. v. Cephalon, Inc., 954 F.3d 615, 618 (3d Cir. 2020).

A. Facts From 1967 until 2022, Merck was the sole licensed manufacturer of mumps vaccines in the United States. Merck accompanied doses of its vaccine2 with FDA- approved labeling that provided information about the drug, including its “shelf life, minimum potency requirements, basis for licensure, and effectiveness[.]” See App. 10,029. Merck had an ongoing duty to ensure that its drug label was accurate. Wyeth v. Levine, 555 U.S. 555, 570–71 (2009) (“[I]t [is] . . . a central premise of federal drug regulation that the manufacturer bears responsibility for the content of its label at all times.”).

In the late 1990s, the FDA raised concerns that Merck’s mumps vaccine might be sub-potent toward the end of its 24-month shelf life, meaning that doses might not contain the minimum amount of live virus stated on the drug label. Merck agreed—at the

1 We write for the benefit of the parties and recite only essential facts. For a more detailed discussion of the factual background, see this Court’s related decision in United States ex rel. Krahling v. Merck & Co., No. 23-2553, 2024 WL 3664648, at *1–5 (3d Cir. Aug. 6, 2024). 2 Merck sold two branded mumps vaccines during the years relevant to this appeal, MMR-II and ProQuad. For simplicity—and because the vaccines used the same mumps component—we refer to a singular “vaccine” when discussing Merck’s mumps vaccines.

FDA’s suggestion—to boost the initial potency of its vaccine, presumably with the hope that overfilled doses would have enough buffer to remain potent through the end of their shelf life.

Overfilling doses did not fix the end-of-shelf-life potency problem with Merck’s mumps vaccine. But Merck did not share that information with the FDA because Merck was concerned that the FDA might—at a minimum—order Merck to reduce the drug- label claims about the shelf life and seroconversion of its mumps vaccine.3 Weakening label claims was not a palatable option to Merck because a rival pharmaceutical manufacturer, GlaxoSmithKline (“GSK”), sold a comparable mumps vaccine in Europe and wanted to bring that vaccine to the United States. Merck feared that GSK’s domestic launch was “imminent.” App. 4840. And Merck was wary of hastening GSK’s arrival by lowering the bar to entry, as GSK needed to show that its mumps vaccine was not inferior to Merck’s mumps vaccine to gain FDA approval. So rather than open the door to competition by disclosing that its mumps vaccine might be misbranded, Merck sought to extend its apparent monopoly by (1) misrepresenting or concealing information about the end-of-shelf-life potency of its vaccine and (2) filing a Supplemental Biologics

3 Seroconversion “refers to a person going from being ‘seronegative’ prior to vaccination, which generally means lacking pathogen specific antibodies, to being ‘seropositive’ after vaccination, which means possessing such antibodies.” In re Merck Mumps Vaccine Antitrust Litig., 685 F. Supp. 3d 280, 293 (E.D. Pa. 2023).

License Application (“sBLA”) seeking the FDA’s approval to maintain the existing drug- label claims about shelf life and seroconversion with a less potent vaccine.

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