From Dr Adrian Crisp.

Sir, It is unreasonable to portray Pfizer as a research-lite company. While researching novel treatments for hypertension – with Inspector Clouseau-like precision – Pfizer stumbled on sildenafil (“Viagra”) known to some doctors as the “Pfizer riser”. Perhaps with the incorporation of AstraZeneca’s research expertise Pfizer might stumble on a cure for Alzheimer’s with similar serendipity.

Adrian Crisp, Weston Colville, Cambridge, UK

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