Injecting garlic to help trees
A group of scientists have been testing out a new vaccine to help stop the spread of disease - but this one is not for people, it's for trees.
They've been looking at ways to stop the spread of tree diseases like ash dieback, which is fungus which can quickly wipe out many trees.
They have developed a new vaccine which uses something called allacin, found in garlic, to help protect the trees from possible diseases.
The vaccine is injected into the trees using a drill, so that it can reach the softer area in the middle of the tree where water moves up and down the trunk.
This means the vaccine can be circulated through the whole tree.
The technique can't be used on all trees, as it's expensive and takes a long time to work.
But it can be used to protect rare and old British trees such as Ash trees.