Zika found in saliva, urine

Brazil's top research institute yesterday said that Zika has been detected in urine and saliva, but added that there is no proof the virus can be transmitted through those fluids.

The main method of infection is via mosquito bites, but scientists are investigating all other possibilities.

Traces of Zika have been detected in other bodily fluids in previous outbreaks, but the Brazilian authorities say this is the first time "active" virus has been detected. There is a also a suspected US case of sexual transmission of the virus.

The United Nations on Friday urged countries hit by the dangerous Zika virus to let women have access to contraception and abortion.

On Thursday, the World Health Organization advised countries against accepting blood donations from people who have travelled to regions affected by the Zika virus.

With dozens of cases emerging in Europe and North America from travellers returning from affected areas, WHO stressed the potential link between Zika and microcephaly -- which causes children to be born with abnormally small heads -- and urged health authorities to take precautions.