Researchers discovered that children who drank farm milk were much less likely to suffer from hayfever and asthma. ""The results of this study indicate that all children drinking farm milk have a lower chance of developing asthma and hayfever. However raw milk may contain pathogens such as salmonella or enterohaemorrhagic E coli and its consumption may have serious health risks. We need to develop a deeper understanding of why farm milk offers children this higher level or protection and investigate ways of making the product safer, while retaining these protective qualities."