Submitted by reuters8361 in business
Biogen <a href="https://www.reuters.com/markets/companies/BIIB.O" target="_blank">(BIIB.O)</a> agreed to buy rare disease drugmaker Reata Pharmaceuticals <a href="https://www.reuters.com/markets/companies/RETA.O" target="_blank">(RETA.O)</a> for nearly $6.5 b…