Description:Hugging someone you know has been linked to positive health effects. Who doesn't like a hug? Now there's scientific data to validate its health benefits. Researchers at the Medical University of Vienna have discovered that hugging can reduce stress, improve memory and well-being and help to lower blood pressure.There is a twist though – the health benefits can only be obtained while hugging someone you know very well. Embracing strangers has a completely opposite effect.(1:09)