Colds often develop gradually over a few days and are usually milder than flu. People with colds are more likely to have a runny or stuffy note. Colds generally do not result in serious health problems, such as pneumonia, bacterial infections, or hospitalisations.
On the other hand, flu symptoms can include a dry, hacking cough as well as a moderate to high fever. Flu symptoms come on quickly and can be severe, lasting usually from 1 to 2 weeks.