About 1 in 5 people infected with Zika virus become ill (i.e., develop Zika).
The most common symptoms of Zika are fever, rash, joint pain, or conjunctivitis (red eyes). Other common symptoms include muscle pain and headache. The incubation period (the time from exposure to symptoms) for Zika virus disease is not known, but is likely to be a few days to a week.
The illness is usually mild with symptoms lasting for several days to a week.
People usually don’t get sick enough to go to the hospital, and they very rarely die of Zika.
Zika virus usually remains in the blood of an infected person for about a week but it can be found longer in some people.