Zika infection is caused by a virus that is spread by mosquitoes (these types of mosquitoes are not found in Washington state). Zika is acquired by traveling to a high-risk areas or through sexual contact with an infected person. The virus can cause birth defects if a pregnant woman becomes infected. Currently there is no medication or vaccine to treat or prevent Zika infection. For more information please see the Centers for Disease Control (CDC) and Washington State Department of Health (DOH) websites.