tracy said it's important to know that every ethnic group is at risk. >> anybody can get what because ,rjn carry you are. >> speculates one reason for the harried a whoppingnities tend to live in extended families. >> the child is exposed to one person with whopping cough they may be able to fight off the they're if they're exposed to several the amount of bacteria that is hitting them will overwhelm their immunity. >> another reason could be a lack of access to health care. >> could get extremely bad extremely quickly it will look like a normal coffin cold and 4p(x= 46úkrqz3.enbeyççthekg'ske >> the doctor says the whopping cough has become an epidemic in california and vaccination is critical not only for children but also for parents. >> now in the bay area marin county is a hundred 95 cases of whooping cough that's the highest number in the state. but how that compares to other counties 55 cases in several months, 32 in contra costa, 31 in san mateo, 24 in santa clara, three and solano and 19 gcárr&ém)(r);xq vicki tells us part of the problem in marin county may have to do with the high number of patients not being vaccinated by their parents. >> nearl