Topic: pneumococcal vaccine

Pfizer

4. Pfizer

Pfizer’s vaccines business has for years centered on Prevnar 13, the world’s bestselling vaccine, and 2017 was no exception. But the company wants to change that—and for good reason.
Merck

2. Merck & Co.

While immuno-oncology star Keytruda has generated plenty of headlines for Merck lately, the company's vaccine business has been on the upswing, too, thanks to human papillomavirus shot Gardasil 9.