if you are talking about milk as in breast milk or formula then yes an infant can take this while on tamiflu or just about any medication. my biggest question would be why is the infant taking tamiflu? it is usually not recommend or used in children under age one according to the literature. i special cases i assume it could be used (although i have never used this drug in this age group) but it has not been well-tested for safety in infants.
can a 9 month infant drink milk while on tamiflu?