'(<a href="http://www.j-archive.com/media/2005-04-04_DJ_19.jpg" target="_blank">Sarah of the Clue Crew wanders about in a medical lab at the University of Pittsburgh.</a>)  I'm at the University of Pittsburgh where Jonas Salk developed his polio vaccine using the controversial de-activated virus method usually called this'
the killed-virus method
HEALTH MATTERS: Im at the University of Pittsburgh where Jonas Salk developed his polio vaccine using the controversial de-activated virus method usually called this
I'm at the University of Pittsburgh where Jonas Salk developed his polio vaccine using the controversial de-activated virus method usually called this
I'm at the University of Pittsburgh where Jonas Salk developed his polio vaccine using the controversial de-activated virus method usually called this
HEALTH MATTERS
the killed-virus method
HEALTH MATTERS