Pandemic viruses may gradually settle into a relatively stable rate of occurrence, maintaining a constant pool of infected hosts capable of spreading the virus to others
The flu, or influenza, is a viral disease of the respiratory tract—the nose, throat, bronchial tubes and lungs—and is highly contagious. A cold is a less severe viral infection, and often includes a runny nose, sneezing and coughing. Unlike flu, colds typically don't cause fever. READ MORE