"An emergency can happen at any moment, and the U.S. must be ready to respond to pandemics, natural disasters, or chemical or radiological threats. Our actions in this area directly serve to protect the health of the American people and is a matter of national security. The terrorist and anthrax attacks of 2001 revealed critical gaps in our nation's preparedness and our ability to connect around response efforts. Emerging diseases like H7N9, MERS [Middle East Respiratory Syndrome], Ebola, and Zika continue to show us that we cannot let our guard down. Preparedness demands constant vigilance and investment to keep up with public health threats as they evolve."
Centers for Disease Control and Prevention: https://www.cdc.gov/