The incubation period – i.e. the period between actual infection and the outbreak of the virus – is three to 12 days. The majority of people infected (60 to 80 percent) show no symptoms at all. The disease’s symptoms are usually mild fever, headaches, muscle and joint pains and a skin rash. In most cases, the symptoms are mild and last for two to seven days. There is no vaccine.
Pregnancy – Possible Deformity Risk
Outbreaks in French Polynesia and Brazil have resulted in an increase in recorded cases of microcephaly in foetuses and newborn babies. The head circumference of individuals suffering from microcephaly (lit. “small head”) is significantly lower than that of a healthy person of the same age and gender. Microcephaly is usually accompanied by mental disability.