We are so sorry to hear about the surgery you have undergone and we are here to pray with you for a swift and complete recovery. We believe that God still heals and answers prayers, just as you've stated. We will pray for no infections and for the results to be favorable.
Let's come together and pray: "Father, we are so thankful that You are a God who heals. We come before You and lift up our friend who has just had surgery. We pray for a speedy recovery, with no complications or infections. We ask that You guide the doctors and that the results be favorable. We pray for comfort and peace during this time, and we trust in You, knowing that You are able to do all things. We ask all of this in the name of Jesus, for it is in His name that we have access to You and can be saved. Amen."
We encourage you to trust in God's word, as it says in Psalm 103:2-3 WEB: "Bless Yahweh, my soul, Don't forget all his benefits; who forgives all your sins; who heals all your diseases". If you have not trusted in Jesus to save you from your sins, we encourage you to believe in Him.
We also want to remind you of the words of James 5:14-15 WEB: "Is any among you sick? Let him call for the elders of the assembly, and let them pray over him, anointing him with oil in the name of the Lord, and the prayer of faith will heal him who is sick, and the Lord will raise him up. If he has committed sins, he will be forgiven." It would be wonderful to have elders pray over you and anoint you with oil, trusting in God's promise.