Best Practices for Human Milk Collection for COVID-19 Research

Michelle K McGuire, Antti Seppo, Ameena Goga, Danilo Buonsenso, María Carmen Collado, Sharon M Donovan, Janis A Müller, Gaston Ofman, Michele Monroy-Valle, Deborah L O'Connor, Ryan M Pace, Philippe Van de Perre

Research output: Contribution to journalArticlepeer-review


In addition to providing life-giving nutrients and other substances to the breastfed infant, human milk can also represent a vehicle of pathogen transfer. As such, when an infectious disease outbreak, epidemic, or pandemic occurs-particularly when it is associated with a novel pathogen-the question will naturally arise as to whether the pathogen can be transmitted through breastfeeding. Until high-quality data are generated to answer this question, abandonment of breastfeeding due to uncertainty can result. The COVID-19 pandemic, which was in full swing at the time this document was written, is an excellent example of this scenario. During these times of uncertainty, it is critical for investigators conducting research to assess the possible transmission of pathogens through milk, whether by transfer through the mammary gland or contamination from respiratory droplets, skin, breast pumps, and milk containers, and/or close contact between mother and infant. To promote the most rigorous science, it is critical to outline optimal methods for milk collection, handling, storage, and analysis in these situations, and investigators should openly share their methods in published materials. Otherwise, the risks of inconsistent test results from preanalytical and analytical variation, false positives, and false negatives are unacceptably high and the ability to provide public health guidance poor. In this study, we provide "best practices" for collecting human milk samples for COVID-19 research with the intention that this will also be a useful guide for future pandemics.

Original languageEnglish (US)
Pages (from-to)29-38
Number of pages10
JournalBreastfeeding medicine : the official journal of the Academy of Breastfeeding Medicine
Issue number1
StatePublished - Jan 1 2021


  • COVID-19
  • breast milk
  • collection
  • human milk
  • methods
  • pathogen

ASJC Scopus subject areas

  • Pediatrics
  • Health Policy
  • Obstetrics and Gynecology
  • Maternity and Midwifery


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