Transmission of the novel coronavirus to infants through breast milk appears unlikely, a new study indicates. Researchers analyzed 64 breast milk samples from 18 infected mothers. One sample contained inactive genetic material from the virus, but none of the samples contained active virus particles, the researchers reported on Wednesday in JAMA. The US Centers for Disease Control and Prevention has advised nursing mothers with possible or confirmed COVID-19 to wear a cloth face covering while breast-feeding a baby and wash hands before touching the child and any pump or bottle parts.