Detection of Messenger RNA COVID-19 Vaccines in Human Breast Milk “Of 11 lactating individuals enrolled, trace amounts of BNT162b2 and mRNA-1273 COVID-19 mRNA vaccines were detected in 7 samples from 5 different participants at various times up to 45 hours postvaccination.” https://jamanetwork.com/journals/jamapediatrics/fullarticle/2796427?guestAccessKey=26b9bd0f-9809-447f-bbbd-23268509df19 >Lactating individuals