Researchers: Breast cancer drug could help more patients


              This undated photo provided by Daiichi Sankyo and AstraZeneca in June 2022 shows a vial and packaging for their Enhertu, an antibody-chemotherapy drug administered intravenously.  (Daiichi Sankyo, AstraZeneca via AP)
            
              This undated photo provided by Daiichi Sankyo and AstraZeneca in June 2022 shows production of their Enhertu, an antibody-chemotherapy drug administered intravenously. (Daiichi Sankyo, AstraZeneca via AP)
            
              This undated photo provided by Daiichi Sankyo and AstraZeneca in June 2022 shows production of their Enhertu, an antibody-chemotherapy drug administered intravenously.  (Daiichi Sankyo, AstraZeneca via AP)
            
              This undated photo provided by Daiichi Sankyo and AstraZeneca in June 2022 shows a vial and packaging for their Enhertu, an antibody-chemotherapy drug administered intravenously.  (Daiichi Sankyo, AstraZeneca via AP)