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Can fish help stop spread of Zika virus?

As Barack Obama requests $1.8bn to fight Zika, some communities in El Salvador think they hold the key to stopping the spread of the virus.

President Obama is asking the US Congress for more than $1.8bn in emergency funding to tackle the spread of the Zika virus.

The World Health Organisation has predicted there could be up to four million cases this year.

Some communities in El Salvador think they hold the key to stopping the spread of the Zika virus, as Katy Watson reports.