When you cannot attend Mass and receive Holy Communion due to health reasons, it is possible to make an Act of Spiritual Communion which is a source of grace. Spiritual Communion means uniting one’s self in prayer with Christ’s sacrifice and worshipping Him in His Body and Blood.
 

My Jesus, I believe that you are present in the Most Holy Sacrament.
I love you above all things and 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. Amen.