Table 1.

Participant characteristics^a that had viral symptoms (M1–M5) and without symptoms (M5–M9), who donated 4 consecutive human milk samples (once per month) during the COVID-19 pandemic from March 2020 to June 2020.

Mothers	Viral symptoms	Infant sex	Postpartum time (mo)	Mother’s age	vaccine during pregnancy
Mother-1, M1	Viral infection in end-February 2020 flu-like symptoms (fever and headaches) for 1.5 wks	Female	5	29	None
Mother-2, M2	Fever, chills, body aches, congestion, cough 2/28/2020 to 03/14/2020	Female	3	32	Tdap
Mother-2, M3	Cold symptoms from 02/27/20 to 03/05/20; coughing, runny nose, and fever.	Male	5	32	None
Mother-4, M4	Viral infection from 03/04/20 to 03/13/20. Symptoms: sneezing, headache, fever, vomiting	Female	5.5	23	Tdap and Rhogam
Mother-5, M5	Sinus infection—headache, congested, sore throat—mid-March 2020 for 2 weeks	Male	4	31	Tdap
Mother-6, M6	None	Male	6	35	Influenza and Tdap
Mother-7, M7	None	Male	3	31	Influenza
Mother-8, M8	None	Male	3	21	None
Mother-9, M9	None	Female	3	35	Influenza and Tdap

^aWomen did not have a medical history, medication, and systematic diseases.