Yes. For example, in recent years Vermont has seen a surge in the number of whooping cough (pertussis) cases throughout the state. Also, because Vermonters travel abroad and many people from other countries come to Vermont on vacation or as immigrants, there is also the very real possibility of introducing an infectious disease from countries that don’t have immunization rates as high as we do in the U.S. This is already happening in other states around the country.
In 2012, there were 635 confirmed cases of whooping cough in Vermont. By comparison, there were only 47 cases confirmed statewide in 2011. Cases of whooping cough are down in 2013 as a result of efforts by the Vermont Health Department to immunize thousands of people around the state, and educate health-care providers, schools, and child-care facilities on disease control. Current whooping cough counts can be seen here: healthvermont.gov/prevent/pertussis/surveillance.aspx.
In other states like California, Washington, New York, New Jersey, Oklahoma, and Maine, outbreaks of measles, mumps, whooping cough, and meningococcal disease have all occurred in the last two years. In one outbreak, mumps was spread across country borders, beginning with an infection in New York that spread through exportation to Canada and Israel.