The phrase "exclusive breastfeeding" refers to feeding an infant only with breast milk and nothing else, not even water or other foods. Full definition
The benefits of exclusive breastfeeding for the first 6 months for both the mother and the baby was new information to most men and led to interactive discussions to develop supportive strategies. (academic.oup.com)
The effect of exclusive breastfeeding on development and incidence of infection in infants. (notmilk.com)