Here’s a cheerful holiday entertainment: find the likelihood that you will suffer from heart disease. The new online calculator for cardiovascular disease is brought to you by researchers at Harvard School of Public Health, and claims to estimate the 20-year risk that you will develop cardiovascular disease (CVD). It’s a somewhat lengthy web survey, with lots of questions about your eating, exercising and drinking, yes drinking, habits, and it also it offers practical tips on improving heart health. But you already knew about them. Good luck.