W e haven't quite forgotten the ebola virus and a new virus has appeared under the spotlight; the Zika virus. The Zika virus is spread by mosquitos, similar in a way to malaria. However, unlike other mosquito-borne diseases, it is relatively unknown and little studied. The virus is currently showing an alarming rise in cases in Latin America and the Caribbean. The virus has also been associated with an alarming rise in babies born in Brazil with abnormally small heads and brain defects -- a condition called microcephaly. Zika is spread by the same mosquito as the dengue virus: Aedes aegypti. Dengue is a serious disease but it doesn't usually kill people, whereas, Zika, is much more serious in that it is able to pass through a woman's placenta and impact the unborn child. Since the Zika outbreak began in northeastern Brazil last spring, an estimated 500,000 to 1.5 million people have been infected. The resulting illness only lasts a few days. The sympt...