Residents who are 50 years or older are now eligible for a third dose, as are people 18 years and older living in the far north or on First Nation communities, and all healthcare workers.
The COVID-19 Science Advisory Table says public health measures and increased vaccination are needed to reduce virus transmission as cases rise in most public health units.
The department says in a statement that the error happened Nov. 24 in Brandon, which is located in the Prairie Mountain Health region in western Manitoba.