(CNN) As North Korea and the United States continue to rattle their nuclear sabers, public tension is rising. North Korea’s claim that the missile it fired Wednesday is capable of reaching any city on the US mainland, whether true or not, adds fuel to that fear.

“All it takes is to turn on television or talk radio to be bombarded with what feels like a constant diatribe, not between the two nations but at each other,” said Harvard instructor Suzet McKinney, an expert in public health preparedness and emergency response. “People are very concerned, and I worry some of our most vulnerable may begin to have difficulty in coping with that level of fear.” Continue reading.