Other

Renegade sperm donor triggers US probe

A California man who donates his sperm for free to couples who want to have a baby is being investigated by US regulators but insists he will continue his efforts as a matter of goodwill.

Medical research

Building a better Rift Valley fever vaccine

University of Texas Medical Branch researchers have significantly improved an existing experimental vaccine for Rift Valley fever virus, making possible the development of a more effective defense against the dangerous mosquito-borne ...

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