(VOVworld) - Four cases of Zika, the mosquito-borne virus associated with brain damaged babies in Latin America, have been discovered in the UK in the last six weeks, Public Health England (PHE) has said, warning that the number is likely to rise. In total, seven people have been diagnosed with Zika in Britain in the last three years but more than half of those have been reported since January. Dilys Morgan, head of the department of gastrointestinal, emerging and zoonotic infections at PHE, told MPs at a select committee inquiry that although there have been two reported cases of sexual transmission of the Zika virus, the risk of transmission in the UK is considered close to zero. The virus has been mainly spread in Latin America by the Aedes aegypti mosquito, which does not live in northern climes. PHE advised pregnant women for further consideration before travelling to Central and Southern America and the Zika-caused epidemic has worried many people as the Summer Olympic will take place in Rio de Janeiro, Brazil, this August.