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Scientists have named three relatively little-known diseases they think could cause the next global health emergency. A coalition of governments and charities has committed $460m to speed up vaccine development for MERS (Middle East Respiratory Syndrome), Lassa fever and Nipah virus. At the Jenner Institute, scientists are developing vaccines for all three of the viruses. Their MERS vaccine candidate is currently at the most advanced stage worldwide. It is expected that it will be trialled in humans by the end of the year.