Yes it will come back. It is due to it's cause that triggers asthma. So stay away from its triggers. Build a strong immune system. I believe that a person should try some activities like sports to create strong body but of course with supervision. Don't push too hard. Good luck on your child's health. God bless.
Yes, it is possible. There could be months or years with no attack and you might think you're totally well, but there will come a time that it might be triggered by something to recur. So always be mindful of what your child eats and his activities to avoid any further attacks.
Yes, It can come back. Asthma can lay dormant for years. There are many factors that bring it on such as stress, allergies, physical shape of the body etc.