Zika virus!?

I get home from work and my husband was playing a game I sat next o him and watched for a little bit until he got off and decided to cook dinner. While we were waiting for the chicken to thaw he was on his phone and looking upset or worried. And he brought up that he doesn't think he wants to try for a baby anymore 😭 I asked why and he shows me what he was researching on his phone. It's called the Zika virus. Has anyone heard of it? How do I get get him to not worry about it?