How to get the right toxidant test for your baby

Now Playing: Parents to watch out for: How do they test for a serious case of toxoplasmosis?Now Playing.Now Playing -- What are the health consequences of Zika?Now Listening Now: What you need to know about Zika before you start a family.Now Listing - Zika and the new U.S. birth rate, now more than double the previous year Now Listings: Newborns tested positive for Zika, more babies born in US in...

Which vaccine is the most effective for HIV?

WASHINGTON (AP) - The latest round of a federal vaccine trial is showing the efficacy of a coronavirus vaccine more than doubling the effectiveness of the vaccine in preventing a new infection.The new results, announced Friday by the Centers for Disease Control and Prevention, are likely to raise questions about whether the new vaccine will be able to keep up with the rapid rate of new...