Influenza (Flu)
Flu, short for influenza, is an infectious and common viral illness spread by coughs and sneezes.
It's not the same as the common cold. Flu is caused by a different group of viruses. Symptoms tend to be more severe and last longer.
You can catch flu all year round, but it is especially common in winter, which is why it is also known as "seasonal flu".
For further information see the Influenza page on the NHS website.
Respiratory Syncytial Virus (RSV)
Respiratory syncytial virus (RSV) is a common cause of coughs and colds. RSV infections usually get better by themselves, but can sometimes be serious for babies and older adults.
To find out more see the Respiratory syncytial virus (RSV) Guide on the NHS website.