A rapid worldwide growth of allergic diseases has taken place during the last three decades, with many at a loss as its precise origins. Research from the UK Allergy Association shows there’s an increase in allergies worldwide, and 30–35% of people suffer from an allergy at some time during their lives. Other research shows the prevalence has doubled over the last 20 years. Recent epidemiological studies of allergy in South Africa have demonstrated stark increases from 1970s levels. This is of particular concern since South Africa has a disproportionate mortality rate from acute asthma, due to limited access to healthcare in certain parts of the country.