Researchers have uncovered the first cases in which HIV almost certainly was transmitted from mothers or other caregivers to children through pre-chewed food. The of HIV in the pre-chewed food was most likely the infected blood in the saliva of the people who pre-chewed the food before giving it to the children. The researchers said their findings suggest that HIV-infected mothers or other caregivers should be warned against giving infants pre-chewed food and directed toward safer feeding options.