When we are unable to receive Communion physically we can still receive Jesus spiritually by praying this prayer:
My Jesus,
I believe that You are present in the Most Holy Sacrament.
I love You above all things, and I desire to receive You into my soul.
Since I cannot at this moment receive You sacramentally,
come at least spiritually into my heart.
I embrace You as if You were already there and unite myself wholly to You.
Never permit me to be separated from You.
Amen.