Which major pharmaceutical company rebranded in 2009 with a new logo featuring a red 'spark of life' symbol, moving away from their previous angular blue logo as they shifted focus from chemicals to healthcare?

The pharmaceutical industry has seen numerous companies undergo significant rebranding efforts as they evolve, merge, or shift focus. These corporate identity changes often reflect strategic pivots in research areas, market positioning, or corporate values. This trivia question tests your knowledge of a notable pharmaceutical company's logo evolution that reflected a major strategic shift in the company's direction and public image.

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Pfizer
Merck
Bayer
GlaxoSmithKline