Newsweek has created a map showing where in the country norovirus ... Dr. William Schaffner, an infectious disease professor at Vanderbilt University School of Medicine in Nashville, Tennessee ...

An curved arrow pointing right. This series of maps shows where contagious diseases are concentrated in this country by state. All data is shown per 100,000 people to adjust for the populations of ...

The CDC maps, for instance, show the Gulf Coast tick ... Health officials, however, note that not all ticks carry pathogens that can cause diseases and that not all bites will transmit illnesses.