Table 1. Reported SARS-CoV-2 positive milk sample cases.
| Publication | Number of positive breast milk samples | Other maternal positive samples | Infant SARS-CoV-2 RT-PCR result | Other neonatal positive samples | In favor/against breastfeeding |
|---|---|---|---|---|---|
| Wu et al.33 | 1/3 | No | Negative | No | Rather against |
| Zhu et al.34 | 3/3 | No | NA | NA | Rather against |
| Bastug et al.41 | 3/3 | No | 8 hours- negative 96 hours-positive | Stool-positive (+96 hours); Serum-positive (+96 hours) | Cautiously against |
| Groß et al.38 | 4/7 | No | Yes, 3 days after mother | Respiratory sincitial virus-positive | Neutral, demand larger studies |
| Fenizia et al.43 | 1/32 | IgM antibodies in milk | Negative | N/A | Neutral |
| Costa et al.39 | 3/6 | Cord blood, placenta | NA | NA | Cautiously-against, demand testing samples before feeding infants |
| Tam et al.37 | 2/7 | No | Yes | Stool-positive | Cautiously in favor |
| Lugli et al.36 | 2/2 | No | Negative | No | Cautiously in favor |
| Chambers et al.40 | 1/66 | NA | NA | NA | In favor |
| Bertino et al.35 | 1/14 | Breast milk tested positive again 26 days after parturition | Yes, at 2 days Negative on days 16, 26, 38 | No | In favor |
| Hinojosa-Velasco et al.44 | 1/2 | Stool samples | Positive immediately after birth | Stool samples | In favor. Raise concerns regarding in-utero vertical transmission. |
| Thanigainathan et al.45 | 1/31 | No | Negative | No | In favor |