Scientists say that with increasing numbers of babies surviving premature birth, childhood asthma is set to become a significant health problem.
The research showed that average asthma rates rose to 14% in babies born prematurely, defined as at least three weeks early.
Those born more than three weeks before the usual 40-week pregnancy term were almost 50% more likely than full-term babies to develop asthma. And babies born more than two months early were three times more at risk.
More top news
Police said they were closing the investigation into who sold the model and TV presenter the drugs which killed her.
Kids Company founder Camila Batmanghelidjh to leave the children's charity, blaming politicians 'ugly games' and austerity for her decision.
A prison officer - who was allegedly assaulted by a prisoner at a crown court - has died.