Big Names Like Johnson & Johnson, Merck & Co. and Pfizer Evaluate Technologies and Existing Vaccines for Ways to Fight Zika

Pfizer Inc (PFE.N), Johnson and Johnson (JNJ.N) and Merck & Co Inc (MRK.N) said they were evaluating their technologies or existing vaccines for their potential to combat Zika, a rapidly spreading mosquito-borne disease linked to birth defects.

A number of drug developers and universities are attempting to produce a vaccine for Zika, which the World Health Organization (WHO) has declared an international health emergency.

But scientists and experts have said producing a safe and effective vaccine will take time.

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