Pear rust - huge tree affected
My Nana has a huge pear tree in her back garden. I don't know how long it's been there but it's the height of a house and branches out across a fairly large area.
We were visiting this weekend and my husband noticed that the leaves had spots on them with disgusting looking growths on the back. A bit of Googling and I've discovered it's called pear rust.
As far as I could see, the entire tree was affected by it.
Is there anything that can be done? Does the tree need chopping down, or is it safe to stay? Is the disease harmful in any way to humans? I have two young children and don't want them to have any problems if they happen to pick up a leaf, and I also don't want the tree to fall on my Nana's house if it's likely to have been damaged by the disease - the tree is so large that it'd destroy a substantial amount of her home!