Vitamin A is needed for good eyesight.
Vitamin A
How is air helpful in maintaining temperature
If you have a biotic infection, pretty helpful.
There is no special treatment for a bone bruise or contusion other than pain control. Gentle range of motion may also be helpful in maintaining function during the healing process.
For Doctors they are an indication of an infection.
which leaves are helpful in the treatment of asthme
Hydrogen peroxide can be helpful.
There is no treatment for HPV, the infection would usual go away within a year. A proper diet for HPV is to take in lots of essential viamins and eat a lot watermelons.
His eyesight was better than the dwarves. He was able to see the boat on the other side of the river.
Lysis
Generally speaking, any medical action which was intended to be helpful can instead lead to a complication or complications.
It depends on what you define as helpful. Yes, all bees have a role in maintaining balance in their ecosystems, especially through pollination, but they are not neccesarily "helpful" to humans directly.