LONDON (Reuters) – Children who eat three or more burgers a week may be at a higher risk of asthma and wheezing, but a healthy diet rich in fruit and fish seems to stave off the risk, according to a large international study.

Researchers from Germany, Spain and Britain who studied data on 50,000 children across the world found the link between burgers and asthma was strongest in rich nations where diets with high levels of junk food are more common.