In its complete response letter, the regulator asked AstraZeneca to improve Ultomiris’ Risk Evaluation and Mitigation Strategy (REMS) and include a background check for patients’ meningococcal vaccination status or require prophylactic antibiotic use before treatment.

And then there were two. Janssen (Johnson & Johnson) is no longer in the running to acquire rare disease player Horizon Therapeutics, the company announced Saturday.