1. UnitedHealth Group’s Optum unit will acquire the primary care division of DaVita, a for-profit chain of dialysis centers, for $4.9 billion. DaVita operates about 300 clinics in six states. (NYT)

2. In a Phase-III trial, 37% of lung-cancer patients treated with a combination therapy of Roche’s Tecentriq, Avastin, and chemotherapy survived a year without the disease worsening, compared to 18% of patients treated with Avastin and chemotherapy. (Reuters)

3. The FDA’s breakthrough and fast-track programs helped reduce drug-approval durations by nearly a year, a new study found. (Los Angeles Times)

4. Amazon canceled a pharmaceutical wholesaler application in Maine. Analysts believe the move indicates that the tech giant may not enter the pharmacy business. (CNBC)

5. A study of 1,500 cancer patients and caregivers found that 89% go online to search for cancer-related information and that millennials are three times more likely than boomers to join online support groups.