It has long been a Catholic understanding that when circumstances prevent one from receiving Holy Communion, it is possible to make an Act of Spiritual Communion, which is a source of grace. Spiritual Communion is an ardent desire to receive Jesus in the Most Holy Sacrament and lovingly embrace him at a time or in circumstances when one cannot receive Him in sacramental Communion.
This can be prayed in any place and at any time.
Act of Spiritual Communion
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 in 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.