IVDD is a debilitating and costly disease that affects dachshunds (and other breeds as well, such as (but not limited to) Corgis, Papillions, Basset Hounds and Miniature Pinschers.) IVDD is particularly prevalent in Dachshunds, an estimated 1 in 5 dogs will suffer from IVDD. The dog's spine is made up of several small bones, called vertebrae. They extend from the base of the skull to the end of the tail. The vertebrae are connected by flexible discs made of cartilage called "intervertebral disc", which cushions between each bone and allow the neck, spine & tail to bend. Running through the vertebrae is the spinal cord - which is made up of nerves.
The increased risk in specific breeds demonstrates a very strong genetic component, which is worsened when irresponsible breeders do little in correcting this defect. The chance of a healthier dachshund is better when purchased from a responsible breeder. While it is extremely important to research any breed you may be interested in obtaining, it is equally important to reseach the breeder.
Restricting jumping, stairs and your dachshund's weight are all important factors in preventing an injury.