Talk to anyone born prior to the 1960s and they will tell you about how polio used to be a terrifying reality. Hundreds of thousands of children across the globe were left paralysed in its wake and confronting images of wards full of iron lung machines circulated.
Both food poisoning and stomach flu can give rise to nausea, vomiting, cramps and diarrhoea - but the two conditions are in fact of different aetiology.
With final packing and preparations well underway for those lucky travellers heading to the Olympic Games, there are just 16 days until the official opening ceremony.
Each year the Hajj pilgrimage takes place in Saudi Arabia when more than 3 million Muslims from over 183 countries converge on the city of Mecca.
Booming low-cost air travel is helping to fuel outbreaks of dengue fever across Southeast Asian countries, according to an expert in the mosquito-borne disease.