The four cases are spread across Canada. There are two in British Columbia, one in Alberta and a newly disclosed case in Quebec, all of them involving recent travel, Dr. Gregory Taylor (right) said.
While mosquitoes are the main source of transmission, Mr. Tayor says there are other possible ways to transmit the virus. He says there is some evidence of mother-to-child transmission, although there are few reports which state so.
1. What is Zika and why is it so serious?
The Zika virus is a flavivirus, part of the same family as yellow fever, West Nile, chikungunya and dengue. But unlike some of those viruses, there is no vaccine to prevent Zika or medicine to treat the infection.
Zika is commanding worldwide attention because of an alarming connection between the virus and microcephaly, a neurological disorder that results in babies being born with abnormally small heads. This causes severe developmental issues and sometimes death.