Why are some people born with disabilities?

According to The Bible, sickness and disease, including birth defects and other disabilities, are a result of sin. Adam and Eve were created perfect, but after they sinned, mankind inherited the sin nature, and with it, we also inherited the consequences of sin. Jesus died to take away the eternal consequences of sin, in other Words, to make it possible for us to go to Heaven instead of Hell, but the physical consequences of sin will be with us until we get to Heaven. The Bible also says that God will make a new earth, on which there will be no sickness nor disease of any kind.