Around one million people every year are struck down by the winter vomiting bug or norovirus.
It's very contagious so good hygiene is essential.
Use disinfectant on kitchen and bathroom surfaces and always wash your hands.
You will need to wash for at least twenty seconds to destroy germs.
So keep scrubbing for as long as it takes to take four deep breaths.
Dehydration is a serious side effect so take small sips of water to replace lost fluids, or try rehydrating remedies.
Most bouts only last a couple of days but you should stay off work until forty eight hours after the symptoms have gone to avoid passing it on.
Bronchitis is an infection of the main airways of the lungs, which causes them to become irritated and inflamed. It is common in winter, and often develops following a cold, sore throat or a bout of the flu.
The main symptom is a cough, which may bring up yellowy-grey mucus and it can be painful.
However, it should clear up by itself, usually within a couple of weeks and over the counter cough medicines can help ease your symptoms.