The race to find protection against the Zika virus is fueled by something often missing from tropical disease research: the potential for big profit. The prospect of a blockbuster vaccine against a mosquito-borne virus has accelerated the pace of development and attracted the interest of big drugmakers, including Sanofi SA (SASY.PA), GlaxoSmithKline Plc (GSK.L) and Takeda Pharmaceuticals (4502.T).

Oxytocin has been dubbed the "love hormone" for its role promoting social bonding, altruism and more. Now new research from Duke University suggests the hormone may also support spirituality.

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