. 2022 Sep 26;176(12):1268–1270. doi: 10.1001/jamapediatrics.2022.3581

Table 2. Detection of Vaccine RNA in Whole Expressed Breast Milk and Extracellular Vesicles in 5 Patients at Various Time Points Postvaccination.

Participant No.	Vaccine type	Time points of vaccine mRNA detection in EBM	Concentration of vaccine mRNA detected in whole milk^a	Concentration of vaccine mRNA detected in EBM EVs^a
4	BNT162b2	27-h^b Sample	Not detected	14.01 pg/mL
6	mRNA-1273	27-h and 42-h^b Samples	11.7 pg/mL	16.78 pg/mL
7	BNT162b2	37-h^b Sample	Not detected	4.69 pg/mL
8	BNT162b2	1-h and 3-h^b Samples	1.3 pg/mL	6.77 pg/mL
10	mRNA-1273	45-h^b Sample	2.5 pg/mL	2.13 pg/mL

Abbreviation: EBM, expressed breast milk; EVs, extracellular vesicles; mRNA, messenger RNA.

^{^a}

Units for concentration are picogram of mRNA per milliliter of whole milk equivalent.

^{^b}

Sample used for vaccine mRNA concentration detection.