Los Angeles County has issued a health alert when it comes to a dangerous virus.

According to the U.S. Centers for Disease Control and Prevention, pregnant women who have recently traveled to areas such as Brazil, Colombia and El Salvador, to name a few locations, should be screened for a mosquito-born disease called Zika.

Symptoms usually include fever, rash, joint pain and red eyes.

The concern came about after a baby was born in Hawaii with an unusually small head, a condition called microcephaly. The woman had traveled from Brazil.

While there is no evidence of any local transmission of the Zika virus in the United States, it has been reported in travelers returning home from South and Central America.

There is no treatment for the virus, and the only way to prevent it is to reduce traveling to certain areas where it is prevalent.

Amy Beasley, Director of Infection Control at Torrance Memorial Medical Center, says the disease is not a big concern here yet. She says it’s not contagious, and that it mostly affects pregnant women.

The CDC also says that 80 percent of people infected with the virus have no symptoms, so it is recommended that pregnant women get an ultrasound if they think they have been exposed to the virus.