Medical Information Only. Consult your healthcare provider before considering clinical trial enrollment.

ClinicalTrials.gov enrollment closed later-stage tilt small index

Herpes Simplex: later-stage trial registry

A small indexed set (6 trials) with no open enrollment listed right now.

Corpus placement: #2,866 of 28,707 conditions by registered trial count.

Jump to phase mix → How counts are built

6 US clinical trials · none currently recruiting · #2,866 of 28,707 conditions by registered trial count

Herpes Simplex: 6 US clinical trials tracked, none currently recruiting.

Herpes Simplex is the subject of 6 registered US clinical trials on ClinicalTrials.gov, none currently recruiting. 4 are in Phase 3-4 (later-stage) and 0 in Phase 1-2 (earlier-stage). The most active sponsor is National Institute of Allergy and Infectious Diseases (NIAID), running 3 of these trials.

Enrollment posture brief

Registry condition herpes-simplex

OPEN 0 | RECR 0% | LATE 4 | EARLY 0 | RANK #2866 | SPON 3

Volume-matched condition peers

Nearest open-share peer: Accelerated Phase Chronic Myelogenous Leukemia (0% recruiting · 12 trials)

Acute Hypoxemic Respiratory 66.7%Abdominal Aortic Aneurysms50%Acupuncture50%Acute Lymphoblastic Leukemia50%Herpes Simplex (this)0%
Open-enrollment share among volume-matched conditions near Herpes Simplex

Herpes Simplex has no open enrollment in this registry pull (6 archived studies). Peers show how other volume-matched labels compare on open share. How peer matching works →

Key findings

What ClinicalTrials.gov does not surface for Herpes Simplex on its own pages , computed from the registry mirror as of 2026-08-08. Each line carries its own denominator so it can be quoted as it stands.

  1. Herpes Simplex is recruiting below its size-band peers.

    0 of 6 indexed trials (0%) are open to enrollment, against a 46.5% average across 27,806 conditions with fewer than 20 trials. The peer set uses the same ClinicalTrials.gov-derived counts as this page.

  2. One sponsor concentrates Herpes Simplex research.

    National Institute of Allergy and Infectious Diseases (NIAID) accounts for 3 of 6 trials (50%). 3 distinct sponsors appear on at least one study for this condition label.

  3. Typical Herpes Simplex enrolment sits around 180 participants.

    Median target enrolment is 180 among the 5 trials that report a genuine target (sentinel values excluded). 2 of those (40%) plan for fewer than 100 participants.

  4. Herpes Simplex research is mostly interventional.

    5 interventional and 1 observational studies make up this index (83.3% interventional). Study type is sponsor-reported on ClinicalTrials.gov.

Phase 34

Phase Distribution

PhaseTrial count
Phase 3 4

Top Sponsors

National Institute of Allergy and Infectious Diseases (NIAID) 3 trials
GlaxoSmithKline 2 trials
Glaxo Wellcome 1 trials

Named interventions

Most-linked intervention names on Herpes Simplex records (sponsor-reported on ClinicalTrials.gov). Counts are trial links, not unique products.

Acyclovir Drug
2 trials
Valaciclovir Drug
1 trials
GSK208141 vaccine Biological
1 trials
Valacyclovir hydrochloride Drug
1 trials
Havrix (investigational formulation) Biological
1 trials
GSK208141 Biological
1 trials
Foscarnet sodium Drug
1 trials
Vidarabine Drug
1 trials

US sites by state

Facility locations filed on Herpes Simplex trials. A trial with sites in several states counts in each.

California 3 trials
Arizona 3 trials
Washington 2 trials
Maryland 2 trials
Illinois 2 trials
Florida 2 trials
Connecticut 2 trials
Colorado 2 trials

Source: ClinicalTrials.gov, National Library of Medicine. Data is informational only.

Related

Read our methodology - how this data is sourced, computed, and verified.

What to do with this Herpes Simplex page

6 registered trials, 0 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.

Trial and recruiting counts reflect ClinicalTrials.gov registry status as of the data vintage above; individual trial eligibility and enrollment status can change.

Every figure on PlainTrial is rendered directly from the ClinicalTrials.gov registry, no number is typed in by an editor. This Herpes Simplex condition card totals 6 registered trials; most-linked intervention Acyclovir; top US site state California. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.