Zika facts

Zika found to remain in sperm for record six months

Doctors at the Spallanzani Institute for Infectious Diseases in Rome said it pointed to the possibility that the virus was reproducing itself in the male genital tract.

The infection is suspected of leading to thousands of babies being born with underdeveloped brains.

Zika is spread by mosquitos.

The outbreak was declared a global public health emergency by the World Health Organisation in February.