It was not only sickness that Jesus could control, but also the physical world. Continue to read from the Holy Gospel:
One day Jesus said to his disciples, “Let’s go over to the other side of the lake.” So they got into a boat and set out. As they sailed, he fell asleep. A squall came down on the lake, so that the boat was being swamped, and they were in great danger. The disciples went and woke him, saying, “Master, Master, we’re going to drown!” He got up and rebuked the wind and the raging waters; the storm subsided, and all was calm. “Where is your faith?” he asked his disciples. In fear and amazement they asked one another, “Who is this? He commands even the winds and the water, and they obey him.” Luke 8.22-25
There were two times when Jesus fed large groups of people. Once he fed 4,000 and once 5,000 men, not including women and children. He started with only a handful of food. He prayed over it, and the food appeared until there were baskets and baskets full for everyone. All of this shows that Jesus had authority over the physical world.