TABLE 1. Sample characteristics and RT-PCR results for SARS-CoV-2 in breast milk.

Author	N	Maternal				Delivery		Neonate				Breast milk
		Age (years)	Presentation at admission	Chest imaging	Outcome	Gestational age at delivery (weeks)	Type of delivery	Gender	Birth weight (g)	Major complications	RT-PCR	Analysis	RT-PCR
Chen, 2020 8	1 -6	Minimum 26, maximum 34	Fever (6/6), cough (2/6), dyspnea (1/6), and diarrhea (1/6)	Evidence of pneumonia	Survived	Minimum 36, maximum 39	Cesarean section	?	Minimum 1880, maximum 3730	No	Negative (URT and placental tissues)	DO	Negative
Dong, 2020 9	7	29	Fever, nasal congestion, and shortness of breath	Evidence of pneumonia	Survived	34	Cesarean section	Female	3120	No	Negative (URT)	Day 6 after delivery	Negative
Fan, 2020 10	8	34	Fever and nasal congestion	Evidence of pneumonia	Survived	37	Cesarean section	Female	3400	No	Negative (URT and placental tissues)	DO	Negative
	9	29	Fever, cough, and nasal congestion	Evidence of pneumonia	Survived	36	Cesarean section	Female	2890	No	Negative (URT and placental tissues)	DO	Negative
Li, 2020 11	10	30	Cough and shortness of breath	Evidence of pneumonia	Survived	35	Cesarean section	Male	?	No	Negative (URT and placental tissues)	DO	Negative
Liu, 2020 12	11	34	Fever	Evidence of pneumonia	Survived	40	Cesarean section	Male	3250	MSAF	Negative (URT and placental tissues)	DO and days 1 and 10 after delivery	Negative
	12	30	Cough	Evidence of pneumonia	Survived	39	Vaginal	Male	3670	No	Negative (URT)	Day 2 after delivery	Negative
Wang, 2020 13	13	34	Fever	Evidence of pneumonia	Survived	40	Cesarean section	Male	3205	MSAF	Negative (URT and placental tissues)	Days 1 and 3 after delivery	Negative
Xiong, 2020 14	14	25	Fever and cough	Evidence of pneumonia	Survived	38	Vaginal	Male	3070	No	Negative (URT and placental tissues)	DO	Negative
Liu, 2020 15	15-24	Minimum 26, maximum 38	Fever (7/10), cough (4/10), and diarrhea (1/10)	Evidence of pneumonia	Survived	Minimum 35, maximum 41	Cesarean section	?	Minimum 2500, maximum 3670	No	Negative (URT and placental tissues)	DO	Negative

URT, Upper Respiratory Tract. MSAF, Meconium Stained Amniotic Fluid.

DO, delivery day or after first lactation.