 [ Symptoms ] can lumbar fusion cause problem for the disk above i had l4 5 l5 s1 fusion now l3 4 is bulging my md called this a cascade effect and is not surprised i cannot find anything supporting this cascade effect [ Disease ] most helpful answer no colds and influenza are caused by viruses not temperature changes viruses enter the body through the nose eyes or mouth not through the skin you can run outside naked if you want and you will not be any more vulnerable to getting a cold or the flu it is okay if your grandmother or mother disagrees with this statement