professors avoca younes and ya liam and isabella polish study allergies the particles of dust they've come here to collect will hopefully provide new insights into why spending time around cows can have health benefits for humans. in the range of studies have shown that farms are like a protected area if you spend a lot of time on the farm especially in the cow shed something in the air makes you resistant to allergies asthma and a topic dermatitis. in the case of children they get protection for later in life pregnant women become less susceptible and even pass on that protection to their children it's called the farm effect on this and i spawn who fucked up. children who grew up on farms how few ology and those who live in cities unfroze who grew up in the immediate vicinity of cows that the grass or hay have even fewer . protective effect works if the home is within a radius of about 300 metres of a cow shed if it's 500 metres away but coverage has disappeared. the belief is that whatever provides. protection is conveyed via the air. hence the dust sample gathering. scientists have

are taking place coming up for you on this news hour on a wing and a prayer stone dennett's calls us avoca across the u.k. and in western europe like a mass and then sport later as well far a will tell us about the ugandan running in itself into the record books. good news. welcome back it's time to take a look at the weather across the americas this time now in north america who have got an area of low pressure developing across parts of the upper midwest so me standing towards the great lakes we've got snow on its northern side there so temperatures hovering just one degrees from minneapolis further south is largely rain and that system is expected to move northward and eastward into the ohio valley cheering the course of choose day further north courser eastern parts of color some heavy snowfall is likely for a time out across western parts of the u.s. it's looking generally find some francisco that a bright day and highs of 18 degrees heading down into the caribbean is a largely fine picture we've got one or 2 showers for particularly the dominican republic and also down through parts