clinicians nationwide to go over guidelines as part of increased vigilance and public education. </p>
            </p>

            <p class="paragraph">
                <p>In the Brazilian cases, most of the exposure to Zika appears to have been during the first trimester of pregnancy. But CDC officials have said there is also evidence that a fetus can be in danger into the second trimester.</p>
            </p>

            <p class="paragraph">
                <p>There is no drug to treat Zika or a vacci