Dr. Joanna Shaw, assistant professor in the Division of Infectious Diseases at Meharry Medical College, was the guest speaker during last week’s Noon Rotary Club meeting. Dr. Shaw has performed original research in the areas of infectious diseases and epidemics.Shaw said the flu, which is caused by the influenza virus, has been more predominant this year than in years past. Tennessee is still having outbreaks of the flu virus, but most new cases of the flu are in East Tennessee, according to the Centers for Disease Control.Shaw talked about how influenza is spread and how to prevent the virus.