He was exposed to an uncle with pertussis (whooping cough) and so had been placed on the antibiotic erythromycin as a preventative measure, but had otherwise seemed fine. (verywellfamily.com)
To build new varieties of erythromycin with a slightly different shape, scientists can theoretically target any part of this assembly line, using various techniques to affix parts with structures that deviate slightly from the originals. (sciencedaily.com)
This practice was a vast improvement over abruptly handing a newborn over to a stranger who would take it to a brightly lit, noisy environment and accost it with a shot, swabbing its eyes with erythromycin ointment and foot printing all before wrapping it in a warm blanket and returning him / her to their mother. (valleymidwives.com)