Last update: Jan. 14, 2021

COVID-19 vaccine

Low Risk for breastfeeding

Moderately safe. Probably compatible.
Mild risk possible. Follow up recommended.
Read the Comment.

Several types of vaccines are currently in development against COVID-19, among those in production there are:
( online, CDC 2020/12/18 y 2020/12/13):
• Messenger ribonucleic acid vaccines (mRNA): BNT162b2, Tozinameran (Pfizer-BioNTech) and MRNA-1273 (Moderna & NIH). This type of vaccine uses portions of mRNA replicated from coronavirus n-19 to induce the synthesis and production of coronavirus n-19 surface proteins from muscle cells located at the site of injection that then act as triggers for the production of antibodies against the COVID-19 virus by the immune system.
• Viral vector-based vaccines: AZD1222 o ChAdOx1 nCoV-19 (Oxford Uni-AstraZeneca) and Gam-COVID-Vac (Gamaleya-Sputnik V). These vaccines use a non-pathogenic strain of human adenovirus that has been modified to contain genetic material that resembling a portion of coronavirus 2019-nCoV that can induce the immune system to react in a way similar to what was previously described with mRNA vaccines.

At the time this last update was completed, we did not find published data regarding the excretion of this substance through breast milk and of the impact that could have on lactation or the breastfeeding child. Currently breastfeeding women have been excluded from all clinical trials (Palacios 2020, Costantine 2020, CDC 2020/12/15, ABM 2020/12/14).

It is highly improbable that any of the components that are part of the vaccines produced against COVID-19 could be excreted through human breastmilk, and even in this could happen, they would all be digested in the gastrointestinal tract of the breastfeeding child (InfantRisk 2020/12/18).
It would seem reasonable to deduct that if the disease (COVID-19) is compatible with lactation then the vaccine developed against it would be even more so, since it does not carry the live virus within its components.

Neither of the types of vaccines currently in development against COVID-19 contain live viruses or preservatives within their components and therefore cannot provoke the disease or cause any alterations to the genetic material of their host (CDC 2020/12/18 y 2020/12/13).
Except for two live attenuated virus vaccines (small pox and yellow fever) that are known to rarely bring about negative effects on breastfeeding children, all vaccines are to be regarded as safe for use during lactation and therefore can be prescribed to breastfeeding women (CDC 2020/02/04).

Similar to what happens when vaccinating against other viruses, the use of a vaccine against COVID-19 would trigger the production of antibodies and the excretion through breastmilk of mainly the IgA type, which would likely help protect the breastfeeding child from COVID-19. (InfantRisk 2020/12/18, ABM 2020/12/14).

Breastfeeding women are not considered to be a high-risk group for COVID-19, specially since they tend to be young and usually healthy and therefore until now there are no specific reasons that would warrant the use of the vaccine in this group.
Several Health institutions, medical societies and also expert consensus have suggested that the vaccine should only be prescribed for breastfeeding women if they would also belong to a high-risk group such as healthcare workers or people afflicted by a chronic disease or condition known to be a risk factor (IHAN 2021, AELAMA 2021, NHS 2021, HIFN 2020, MS España 2020/12/30, ACOG 2020/12/13, CDC 2020/12/15 y 2020/12/13).

Vaccinating against COVID-19 should not be an impediment to begin lactation nor a cause for its interruption (ACOG 2020/12/13).

See below the information of this related product:

Suggestions made at e-lactancia are done by APILAM´s pediatricians and pharmacists, and are based on updated scientific publications.
It is not intended to replace the relationship you have with your doctor but to compound it.

Jose Maria Paricio, Founder & President of APILAM/e-Lactancia

Your contribution is essential for this service to continue to exist. We need the generosity of people like you who believe in the benefits of breastfeeding.

Thank you for helping to protect and promote breastfeeding.

José María Paricio, founder of e-lactancia.

Other names

COVID-19 vaccine is also known as


COVID-19 vaccine belongs to this group or family:


  1. NHS - National Health Service UK. Coronavirus (COVID-19) vaccine. 2021 Full text (link to original source)
  2. NHS. Public Health England. A guide to COVID-19 vaccination. All women of childbearing age, those currently pregnant or breastfeeding. Leaflet. 2021 Full text (link to original source) Full text (in our servers)
  3. IHAN. Iniciativa para la Humanización de la Asistencia al Nacimiento y la Lactancia. Comunicado IHAN: vacunación frente a COVID-19 y lactancia materna. 2021 Full text (link to original source) Full text (in our servers)
  4. WHO Interim recommendations for use of the Pfizer– BioNTech COVID-19 vaccine, BNT162b2, under Emergency Use Listing. 2021 Abstract Full text (link to original source) Full text (in our servers)
  5. AELAMA (Asociación Española de Lactancia Materna). Gómez Fernández-Vegue, M. Consideraciones acerca de las vacunas frente a la COVID-19 y la lactancia materna. 2021 Abstract Full text (link to original source)
  6. CDC - Centers for Disease Control and Prevention. Vaccination Considerations for People who are Pregnant or Breastfeeding. CDC 2020/12/15 Full text (link to original source)
  7. CDC - Centers for Disease Control and Prevention. Vaccination Safety for Breastfeeding Mothers. CDC 2020/02/04 Full text (link to original source) Full text (in our servers)
  8. ABM - The Academy of Breastfeeding Medicine. Considerations for COVID-19 Vaccination in Lactation. ABM 2020/12/14 Full text (link to original source) Full text (in our servers)
  9. Infant Risk Center. COVID-19 Vaccine in Pregnancy and Breastfeeding. InfantRisk 2020/12/18 Full text (link to original source) Full text (in our servers)
  10. CDC - Centers for Disease Control and Prevention. Understanding mRNA COVID-19 Vaccines. CDC 2020/12/18 Full text (link to original source)
  11. CDC - Centros para el control y prevención de enfermedades. Información para entender cómo actúan las vacunas contra el COVID-19. CDC 2020/12/18. Full text (link to original source) Full text (in our servers)
  12. Costantine MM, Landon MB, Saade GR. Protection by Exclusion: Another Missed Opportunity to Include Pregnant Women in Research During the Coronavirus Disease 2019 (COVID-19) Pandemic. Obstet Gynecol. 2020 Jul;136(1):26-28. Abstract
  13. NHS - National Health Service UK. Coronavirus (COVID-19) vaccine. NHS, 2020/12/18 Full text (link to original source) Full text (in our servers)
  14. HIFN - Hospital Infant Feeding Network. There is an urgent need to amend UK guidance on administration of the mRNA-based Covid-19 vaccines to lactating people - in line with American guidance - and to commit to immediate collection of safety data in this population. Statement from the GP Infant Feeding Network, the Hospital Infant Feeding Network and Breastfeeding for Doctors. 2020 Full text (link to original source) Full text (in our servers)
  15. MS España. Ministerio de Sanidad. Ministerio de Ciencia e Innovación. Gobierno de España. ¿Puedo vacunarme si estoy embarazada o quiero quedarme embarazada? ¿Y si tengo un bebé lactante?. 2020. Actualización: 30/12/2020 Full text (link to original source) Full text (in our servers)
  16. Palacios R, Patiño EG, de Oliveira Piorelli R, Conde MTRP, Batista AP, Zeng G, Xin Q, Kallas EG, Flores J, Ockenhouse CF, Gast C. Double-Blind, Randomized, Placebo-Controlled Phase III Clinical Trial to Evaluate the Efficacy and Safety of treating Healthcare Professionals with the Adsorbed COVID-19 (Inactivated) Vaccine Manufactured by Sinovac - PROFISCOV: A structured summary of a study protocol for a randomised controlled tr... Trials. 2020 Oct 15;21(1):853. Abstract
  17. ACOG - American College of Obstetricians and Gynecologists Vaccinating Pregnant and Lactating Patients Against COVID-19. ACOG 2020/12/13 Full text (link to original source) Full text (in our servers)
  18. CDC - Centers for Disease Control and Prevention. COVID-19 ACIP Vaccine Recommendations. Current COVID-19 Vaccine Recommendations. MMWR 2020/12/13 Full text (link to original source)

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