It's that time of year when cold and flu viruses are plentiful. You may wake up with symptoms such as congestion, sneezing, coughing. But is it the flu, or just your average common cold? While they are both contagious respiratory viral infections, they do differ. It's important to know the difference, because the flu can result in serious health problems. This ebook will explain the difference between a cold and a flu, how to treat them and how to avoid them.