US scientists say they have developed a cream which could for the first time prevent someone from becoming infected with genital herpes.
The virus is carried by half a billion people worldwide - the disease can be controlled, but it is hard to stop it spreading to others through sex.
This topical treatment, which has so far been tested only on mice, stops the virus from replicating in a new host.
The research appears in the journal Cell Host and Microbe.
The type-2 herpes simplex virus is sexually transmitted and can cause painful, fluid-filled blisters to develop.
It can also be passed from mother to child during childbirth, putting the infant at risk of brain damage and even death if left untreated. source: BBC
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