Pfizer loses top vaccine scientist Jansen who led drive for COVID-19 shot, searches for successor

Amid Pfizer's run as a global vaccine heavyweight—emphasized lately by its success with COVID-19 shot, Comirnaty—the company is losing a top scientist.

Kathrin Jansen, the leader of Pfizer's vaccine R&D group, has decided to retire, the company's Chief Scientific Officer Mikael Dolsten said in a LinkedIn post. The company plans to conduct a search for her replacement and will name a successor afterward, he said.