The disease starts with a mosquito bite and normally causes little more
than a fever and rash. Zika has however been linked to a surge in the
number of children in Latin America born with microcephaly - abnormally
small heads and brains.
Thailand and Indonesia have reported one case each, but health experts
have warned some Asian nations are vulnerable to a Zika outbreak. Health
authorities have said Zika could infect up to four million people in
Latin America and spread worldwide.