Skip to content

Is COVID-19 Transmitted Through Human Milk? Implications for Breastfeeding and Human Milk Banking-Study 1c

Is COVID-19 Transmitted Through Human Milk? Implications for Breastfeeding and Human Milk Banking-Study 1c

Status
Completed
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT05004740
Enrollment
78
Registered
2021-08-13
Start date
2021-01-17
Completion date
2023-04-27
Last updated
2025-06-06

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Breastmilk, COVID-19 Vaccine

Brief summary

This will be a prospective observational study of lactating mothers who are planning to, have scheduled or have received vaccination against SARS-COV-2 (COVID-19 vaccine). Mothers may have delivered at Mount Sinai Hospital or may be from the general public recruited by social media or word of mouth. As the study participants will be lactating mothers, they will not be under the care of the investigators. Due to lack of information, we are unsure of an appropriate sample size but envision we will recruit at least 10 women each immunized with the approved mRNA vaccines (e.g. Pfizer-BioNTech and Moderna COVID-19 vaccines) and in the future at least two other vaccines (e.g. Oxford-AstraZeneca) as they are approved and become available. Milk samples will be analyzed for the presence of antibody to SARS-CoV-2 using the Anti-SARS-CoV-2 ELISA (IgG and IgA). These analyses will be conducted in the Department of Microbiology at Sinai Health following validation of the procedures in human milk.

Interventions

OTHERVaccinated Pregnant or Lactating persons

vaccinated lactating persons from Sinai Health System or the general public

Sponsors

University of Toronto
CollaboratorOTHER
Sinai Health System
CollaboratorOTHER
Deborah O'Connor
Lead SponsorOTHER

Study design

Observational model
COHORT
Time perspective
PROSPECTIVE

Eligibility

Sex/Gender
ALL
Healthy volunteers
Yes

Inclusion criteria

* lactating birthing persons from the general public or Sinai Health System

Exclusion criteria

* None

Design outcomes

Primary

MeasureTime frame
Number of participants with and timing of SARS-CoV-2 specific antibodies in breastmilk post-vaccinationWeek prior to first dose of vaccination and until 4 weeks following the second dose of vaccination.

Countries

Canada

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026