New York City Observational Study of Mpox Immunity

NCT ID: NCT05654883

Last Updated: 2025-10-30

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

ENROLLING_BY_INVITATION

Total Enrollment

174 participants

Study Classification

OBSERVATIONAL

Study Start Date

2022-11-11

Study Completion Date

2026-06-30

Brief Summary

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The goal of this study is to assess the immune response, tolerance, and safety of the low-dose intradermal (forearm) mpox vaccine in people who are HIV+ compared to people who are HIV-, and compared to the standard-dose subcutaneous (upper arm) vaccine. The resulting data will fill knowledge gaps, inform public health practices, and address community concerns about the absence of data for low-dose intradermal mpox vaccinations in people living with HIV.

Detailed Description

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Conditions

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Monkeypox Mpox HIV

Study Design

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Observational Model Type

COHORT

Study Time Perspective

PROSPECTIVE

Study Groups

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HIV-negative, SQ-SQ, short interval

HIV-negative patients who received two subcutaneous mpox vaccinations with an interval of \<7 weeks between primer and booster doses.

No interventions assigned to this group

HIV-positive, SQ-SQ, short interval

HIV-positive patients who received two subcutaneous mpox vaccinations with an interval of \<7 weeks between primer and booster doses.

No interventions assigned to this group

HIV-negative, ID-ID, short interval

HIV-negative patients who received two intradermal mpox vaccinations with an interval of \<7 weeks between primer and booster doses.

No interventions assigned to this group

HIV-positive, ID-ID, short interval

HIV-positive patients who received two intradermal mpox vaccinations with an interval of \<7 weeks between primer and booster doses.

No interventions assigned to this group

HIV-negative, SQ-SQ, SQ-ID, ID-SQ or ID-ID, long interval

HIV-negative patients who received either:

1. subcutaneous primer and booster mpox vaccinations, OR
2. intradermal primer and booster mpox vaccinations, OR
3. subcutaneous primer followed by intradermal booster mpox vaccination OR
4. intradermal primer followed by subcutaneous booster mpox vaccination

with the booster dose being taken after an interval of ≥7 weeks.

No interventions assigned to this group

HIV-positive, SQ-SQ, SQ-ID, ID-SQ or ID-ID, long interval

HIV-positive patients who received either:

1. subcutaneous primer and booster mpox vaccinations, OR
2. intradermal primer and booster mpox vaccinations, OR
3. subcutaneous primer followed by intradermal booster mpox vaccination OR
4. intradermal primer followed by subcutaneous booster mpox vaccination

with the booster dose being taken after an interval of ≥7 weeks.

No interventions assigned to this group

SQ-ID or ID-SQ, short interval

1. subcutaneous primer and intradermal booster mpox vaccinations, OR
2. intradermal primer and subcutaneous booster mpox vaccinations

with the booster dose being taken after an interval of \<7 weeks.

No interventions assigned to this group

1st Dose Only

Participants who receive a 1st dose of the mpox vaccination but elect not to take 2nd dose.

No interventions assigned to this group

Convalescent, No Vaccination

Participants who are convalescent from mpox infection who do not receive mpox vaccination.

No interventions assigned to this group

Convalescent, Vaccination Post-Infection

Participants who are convalescent from mpox infection who receive mpox vaccination after infection.

No interventions assigned to this group

BT after Vaccinations

Participants who experienced breakthrough (BT) mpox infections following mpox vaccination.

No interventions assigned to this group

Eligibility Criteria

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Inclusion Criteria

1. Must be able to understand and sign the Informed Consent Form (ICF)
2. ≥18 years of age

a. Including breastfeeding and pregnant people
3. Must have one or the other of criteria a and b, or can have both:

1. Planning receipt of (in the next 30 days) or have received the mpox vaccine, and/or
2. people with recent mpox infection who are out of isolation (≥30 days after symptom onset)
4. Willingness and ability to participate in all study procedures

Exclusion Criteria

1. Known clinically significant anemia (i.e., Hb \< 10 g/dL)
2. Contraindication to phlebotomy based on investigator judgement; e.g., anti-coagulation therapy with history of phlebotomy complications, or clinically significant thrombocytopenia
3. Any condition that, in the opinion of the Investigator, would make study participation unsafe for the individual or would interfere with the objectives of the study
Minimum Eligible Age

18 Years

Maximum Eligible Age

100 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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NYU Langone Health

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Angelica Kottkamp, MD

Role: PRINCIPAL_INVESTIGATOR

NYU Langone Health

Locations

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NYU Langone Health

New York, New York, United States

Site Status

Countries

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United States

Other Identifiers

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22-01338

Identifier Type: -

Identifier Source: org_study_id

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