Book of Common Prayer (page 555)

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When desired, deacons may be appointed to carry the Sacrament and
minister Holy Communion to those communicants who, because of sickness
or other grave cause, could not be present at the ordination.

If the remaining Elements are not required for the Communion of the
absent, it is appropriate for the deacons to remove the vessels from the
Altar, consume the remaining Elements, and cleanse the vessels in some
convenient place.