First dose to be taken preferably at 6th week. The rotavirus vaccine is given as oral drops in either two or three doses, depending on the type. If you miss a scheduled dose and remember soon after, simply schedule another. Your child should receive the first dose of the rotavirus vaccine when they are older than six weeks of age and younger than 15 weeks of age. If they receive the first dose when they are 15 weeks of age or older, they should receive the other doses at proper intervals and finish up before they are eight months of age. This Vaccination should be spaced at least four weeks apart.