An international study on recessions and governments' responses to them has found that cuts to healthcare systems prompted by fiscal austerity are making matters far worse—for both governments and society.

David Stuckler, a sociology professor at Oxford University and co-author of the book "The Body Economics," told CNBC on Thursday that responses to recessions had not only been inadequate and counter-intuitive but had caused widespread deaths because of a reduction in access to healthcare and medicines.