Obituaries

Stanford Medicine —

Pathologist, Christmas tree farmer Jon Kosek dies at 90

An outdoor enthusiast, bicyclist and founder of a Christmas tree farm, Kosek was a staff pathologist at the VA Palo Alto Heath Care System for nearly 45 years, mentoring hundreds of residents and students.

Stanford Medicine —

HIV/AIDS researcher David Katzenstein dies

The Stanford virologist conducted clinical vaccine trials, which led to the approval of antiretroviral drugs, greatly improving the survival of people living with HIV.