Expired Preliminary-Injunction Appeals in School Vaccine Disputes: When “Capable of Repetition” Is Too Speculative

1. Introduction

In A.A.C. v. Starpoint Central School District (2d Cir. Jan. 16, 2026) (summary order), the Second Circuit dismissed as moot an interlocutory appeal from a preliminary injunction that had barred a New York school district from excluding a sixth-grade student (A.C.) for noncompliance with New York’s immunization requirements.

The plaintiffs (A.C.’s parents) sought to keep A.C. in school based on a medical exemption. The defendants (the Starpoint Central School District and various officials) challenged the district court’s preliminary injunction after it held, on an unpleaded state-law theory, that the school could not deny what the district court viewed as a “facially and procedurally valid” physician-certified exemption request.

The key appellate issue was jurisdictional: once the injunction expired at the end of the school year, was the appeal still live under the “capable-of-repetition-yet-evading-review” exception to mootness?

2. Summary of the Opinion

The Second Circuit held the appeal was moot because the preliminary injunction had expired. It rejected application of the “capable-of-repetition” exception, concluding that recurrence of the same dispute was “highly speculative” due to materially changed facts (new exemption forms, altered medical descriptions, different vaccine coverage, different procedural posture) and a changed legal landscape (the Supreme Court’s vacatur of Miller v. McDonald, the decision the district court relied on most heavily).

Accordingly, the court dismissed the appeal for lack of a live case or controversy and did not reach the merits of the underlying vaccination-exemption dispute.

3. Analysis

A. Precedents Cited

1) The capable-of-repetition framework: Doe v. McDonald and Lillbask ex rel. Mauclaire v. State of Connecticut Department of Education

The court applied the two-part test quoted in Doe v. McDonald, 128 F.4th 379 (2d Cir. 2025), which itself quotes Lillbask ex rel. Mauclaire v. State of Connecticut Department of Education, 397 F.3d 77 (2d Cir. 2005): the exception applies only where (1) the challenged action is too short in duration to be fully litigated before it ends, and (2) there is a reasonable expectation that the same complaining party will face the same action again.

While annual renewal of medical exemptions under N.Y.C.R.R. tit. 10, § 66-1.3(c) gave defendants a plausible argument on the first prong, the Second Circuit focused on prong two: whether the “same” dispute would recur in a sufficiently concrete way.

2) Special caution for expired preliminary-injunction appeals: Independence Party of Richmond County v. Graham

The decision is driven by Independence Party of Richmond County v. Graham, 413 F.3d 252 (2d Cir. 2005), which cautions against using the capable-of-repetition exception to review otherwise moot interlocutory appeals from preliminary injunctions. The court reiterated three concerns from Independence Party:

  • No evasion of review when issues remain pending before the district court.
  • Interlocutory review is already exceptional given 28 U.S.C. § 1291’s final-judgment rule; expansion is disfavored.
  • Merits preemption: preliminary-injunction review can effectively pre-decide merits issues; that intrusion is less justified once the injunction has expired.

Here, those institutional concerns reinforced a narrow approach to “capable of repetition” in the preliminary-injunction context.

3) Avoiding advisory opinions: Chafin v. Chafin and Lewis v. Continental Bank Corp.

To explain why an expired injunction should not be reviewed based on hypothetical recurrence, the court invoked the Article III prohibition on advisory opinions, citing Chafin v. Chafin, 568 U.S. 165 (2013), quoting Lewis v. Continental Bank Corp., 494 U.S. 472 (1990). The court characterized review of the expired injunction as risking guidance on “a hypothetical state of facts,” given the changed medical submissions and altered legal baseline.

4) The district court’s reliance on a now-vacated decision: Miller v. McDonald

A notable feature was the Second Circuit’s emphasis that the district court’s primary authority, Miller v. McDonald, 130 F.4th 258 (2d Cir. 2025), had been “cert. granted and judgment vacated,” Miller v. McDonald, No. 25-133, 2025 WL 3506969 (U.S. Dec. 8, 2025). That vacatur mattered not as a merits holding here, but as a reason recurrence of the same legal controversy was uncertain: the district court’s prior interpretive anchor no longer “exist[ed]” in the same form, making repetition of the identical dispute less likely.

5) “Neutral and generally applicable” vaccination laws and discretion: We The Patriots USA, Inc. v. Hochul and Fulton v. City of Philadelphia

Although the Second Circuit did not decide any Free Exercise claim, it clarified the context in which Miller had discussed medical exemptions. Miller drew on We The Patriots USA, Inc. v. Hochul, 17 F.4th 266 (2d Cir. 2021), opinion clarified on other grounds, 17 F.4th 368 (2d Cir. 2021), and contrasted discretion analysis with Fulton v. City of Philadelphia, 593 U.S. 522 (2021). The panel emphasized that the relevant “discretion” point in those cases concerned whether officials had “unfettered” authority that would undermine general applicability—not whether a school must accept any physician-signed form at face value.

6) State-law exhaustion and the untested merits: Coritsidis v. New York City Department of Education and Lynch v. Clarkstown Central School District

The opinion situated the district court’s novel state-law theory against sparse New York merits authority. It noted:

  • Coritsidis v. New York City Department of Education, 242 A.D.3d 886 (2d Dep’t 2025), which rejected a direct Article 78 challenge for failure to exhaust administrative remedies (without reaching merits).
  • Lynch v. Clarkstown Central School District, 590 N.Y.S.2d 687 (N.Y. Sup. Ct. 1992), a trial-level decision rejecting a similar “arbitrary and capricious” theory on the merits (in the religious-exemption context).

These citations underscored that the district court’s construction of N.Y. Pub. Health Law § 2164—especially any “no discretion” reading—was not clearly grounded in developed state appellate precedent, which further counseled against federal interlocutory review once the injunction expired.

B. Legal Reasoning

The court’s reasoning is best understood as a disciplined application of Article III and appellate-procedure constraints:

  1. The appeal was moot as a baseline. Once the preliminary injunction expired at the end of the school year, there was no ongoing restraint for the court to dissolve or modify.
  2. The capable-of-repetition exception did not fit the actual dispute. Even if annual renewal could make school-year injunctions short-lived, the panel found recurrence of the “same” controversy speculative because:
    • The 2025–2026 exemption forms differed (different vaccines included; the condition described as “unstable” rather than “chronic”).
    • The district’s handling differed (A.C. was allowed to attend school pending review of the later request).
    • The plaintiffs’ litigation posture differed (no parallel preliminary-injunction challenge to the denial in the same manner; potential resort to state administrative and Article 78 processes).
    • The district court’s main authority (Miller) had been vacated, changing the legal backdrop.
  3. Independence Party supplied a prudential backstop. Because this was an interlocutory appeal and the injunction had already expired, the case exemplified why courts resist turning the capable-of-repetition exception into a vehicle for advisory review of preliminary, fact-bound decisions.

C. Impact

  • Interlocutory strategy in school-immunization litigation. Parties appealing preliminary injunctions should expect dismissal as moot once the order expires, absent a concrete showing that the same dispute will recur in a materially similar posture—especially where new school-year facts and renewed exemption submissions alter the record.
  • Heightened importance of procedural pathways. The opinion highlights (without deciding merits) that New York’s statutory and regulatory structure anticipates administrative review and potential Article 78 litigation, and that bypassing those channels may affect both timing and the federal courts’ appetite for interlocutory intervention.
  • Caution in relying on vacated federal precedent for state-law interpretations. Where a district court’s state-law ruling leans heavily on a federal appellate decision that is later vacated, the likelihood of repeating the “same” legal question diminishes—making mootness exceptions harder to satisfy and emphasizing the instability of such foundations.

4. Complex Concepts Simplified

  • Mootness: Federal courts can only decide live disputes. If the court can no longer grant meaningful relief (here, because the injunction already expired), the case is generally moot.
  • Capable-of-repetition-yet-evading-review: A narrow exception allowing courts to hear an otherwise moot case if the issue is inherently short-lived and likely to happen again to the same party. The key is a realistic, not speculative, expectation of repetition.
  • Interlocutory appeal / preliminary injunction: A preliminary injunction is temporary relief before final judgment. Appeals from such orders are permitted, but they are an exception to the usual rule that only final judgments are appealable.
  • Advisory opinion: Courts may not issue abstract legal guidance divorced from a concrete dispute; deciding an expired injunction based on hypothetical future facts risks crossing that line.
  • Article 78 (New York): A state-court proceeding commonly used to challenge administrative action as “arbitrary and capricious,” typically after required administrative steps are exhausted.

5. Conclusion

The Second Circuit’s dismissal in A.A.C. v. Starpoint Central School District reinforces a practical jurisdictional rule: once a school-year preliminary injunction expires, appellate review will usually be moot, and the “capable-of-repetition” exception will not apply where the next year’s medical submissions, agency posture, and governing legal landscape meaningfully change. The decision is less about vaccine policy than about Article III limits, the restricted role of interlocutory appellate review, and the judiciary’s refusal to decide fact-bound, preliminary disputes that have already ended and may not recur in the same form.