A recent outbreak of gastrointestinal illness at my son's daycare and subsequently at my house, brought to light a common confusion between the flu (influenza) and what is commonly called 'stomach flu' (gastroenteritis, commonly caused by norovirus). People are also often confused between the common cold and influenza. The following table gives some basic guidelines to help differentiate between them.
As you can see, the stomach 'flu' is very different from influenza. Knowing this, you can treat them differently. Hopefully this brief post has helped you to understand these common ailments.
Table adapted from: www.health.alberta.ca/health-info/influenza-compare-symptoms.html