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Hello and welcome to Health Check from the BBC.
I'm Claudia Hammond.
Could our state of mind when we get vaccinated affect how well the vaccine works?
New research on that in a moment.
And I suspect there are quite a few of us who can empathise with that feeling of keeping stuff for years and years.
But when does a tendency to hold onto things become more worrying?
Later on we'll meet someone who's going to help us understand just how complex hoarding is and how it is more than just a problem of too much stuff.
And my guest today is Catherine Love Day,
who's professor of cognitive neuroscience at the University of Westminster.
How are you?
I'm good.
Thank you.
Well, thank you for joining us on health check today.
What else do you have for us?
I've got some data that suggests that menopause might be bad for the brain and grandparenting might be good for the brain.