It's not a matter of if the novel coronavirus will spread throughout the United States, but when, said Centers for Disease Control and Prevention vaccine expert Nancy Messonnier. "Disruption to everyday life might be severe," Messonnier, who is the director of the National Center for Immunization and Respiratory Diseases, told reporters Tuesday. Messonnier said she told her children over breakfast that they will need to begin preparing for an escalated outbreak. Parents and caregivers, she said, should ask officials at their children's schools about plans for school dismissals, closures, and teleschool in case the virus spreads in their school districts....