Eli Lilly announced Tuesday that it is acquiring Curevo Inc., LimmaTech Biologics AG and Vaccine Company, Inc., in deals totaling nearly $4 billion.

Worth close to $4 billion combined, the acquisitions of Curevo, LimmaTech and Vaccine Co. signal plans by Lilly to build an infectious disease portfolio.

The deals give Lilly vaccines targeting shingles, bacterial pathogens, and Epstein-Barr virus as it expands beyond weight loss drugs