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The Hensley laboratory uses basic virology and immunology techniques to understand how seasonal influenza viruses escape pre-existing immune responses. The laboratory is interested in how seasonal influenza changes from year-to-year, as proteins on the surface of the virus accumulate mutations, a phenomenon known as antigenic drift. Since antigenic drift is often unpredictable, one goal of the Hensley laboratory is to create a universal flu vaccine that will essentially attack viral coat proteins in places that cannot be easily mutated.
The microscope in the image belonged to William E. Horner, M.D., a collaborator with Caspar Wistar, M.D., in the early 1800s.
Dr. Horner, a lecturer at the University of Pennsylvania, was a pioneer of the use of microscopes in anatomical and medical research. He authored Special Anatomy and Histology, a seminal text on the subject.