. >> reporter: kelly baker was only 36 years old when doctors found ten tumors growing in her left breast. >> there's no history at all of breast cancer in my family. and it was a shock. >> reporter: baker underwent five rounds of chemotherapy, radiation and a double mastectomy, but since the cancer had already spread to her lymph nodes, doctors sai her chance of recurrence was high. a frightening thought for the virginia mother and wife. >> a lot of it is is that. if i could do anything to keep it from coming back, like you said, you know, you feel very young, like you're not anywhere near ready for things to be done. >> hi, kelly. >> hell loi. >> how are you? >> reporter: that's when doctors recommended she come here, to sibley hospital, the only local testing site for a breast cancer vaccine that researchers hope can prevent tumors from coming back in patients le baker. >> the vaccine is really for prevention. so it sort of shifts the focus from treatment to prevention. so this is -- >> reporter: oncologist doctor says the vaccine is being tested on women who have a high risk of recurr

. >> reporter: kelly baker was only 36 years old when doctors found ten tumors growing in her left breast. >> there's no history at all of breast cancer in my family and it was a shock. >> reporter: baker underwendt five rounds of chemotherapy, radiation and double mastectomy. but since the cancer had already spread to her lymph nodes, doctors said her chance of recurrence was high. a frightening thought for the virginia mother and wife. >> a lot of is that, if i can do anything to keep it coming back, you feel very young, like you're not anywhere near ready for things to be done. >> hi, kelly. how are you? >> reporter: that's when doctors recommend she come here to sibley hospital, the only local testing site for a breast cancer vaccine that researchers hope can prevent tumors from coming back in patients like baker. >> the vaccine is really f prevention so it shifts the focus from treatment to prevention. >> reporter: oncogist dr. lisa mcgrail said the vaccine is being tested on women who have a high risk of recurrence and whose tumor cells have a specific protein. that protein is found

. >> reporter: kelly baker was only 36 years old when doctors found ten tumors.wing in her left breast. >> there's no history at all of breast cancer in my family and it was a shock. >> reporter: baker underwept five rounds of chemotherapy, radiation and a double mastecto mastecto, but since the cancer had already spread to her himth nodes, doctors said her chance for recurrence was high, a fright anything thought for the virginia mother and wife. >> a lot of it is that, if i could do anything to keep it from coming back like you said, you feel very young like you're not anywhere near ready. >> reporter: that's when doctors recommended she come here, the only local testing site for breast cancer vaccine that researchers hope can prevent tumors from coming back in patients like baker. >> the vaccine is really for prevention. so it sort of shifts the focus from treatment to prevention. >> reporter: oncologist say the vaccine is being test order women who have a high risk of recurrence and whose tumor cells have a specific protein, that protein is found this 70% of