A study just published in the scientific journal NATURE found that Zika virus could cause infertility in men. The study showed that mice infected with Zika had shrunken testicles, low testosterone levels and low sperm counts. These findings according to researchers are most likely irreversible since infected cells within the testicles are destroyed. Whether Zika has the same effect in men is presently unknown but men interested in fertility should consider freezing their sperm before traveling to areas were Zika carrying mosquitos are endemic.
The CDC website currently lists all the areas affected.