There's good evidence that underlying conditions increase the risk of severe COVID-19 disease.

But where are those conditions distributed around the world?

With Andy Clark and others, we used the Global Burden of disease to estimate this.

NB: not peer reviewed (1/6)
We calculated the % of each country population with 1 underlying condition, or more than 1 condition.

We estimated the age of these groups, to identify the fraction of the working age population at risk.

Why do we need to identify them?

NB: not yet peer reviewed (2/6)
We created a dynamic tool so that countries can see the numbers at risk and needing shielding under different policies.

Age groups & underlying conditions can be selected for 188 countries.

The tool is available here: https://cmmid.github.io/topics/covid19/severity/Global_risk_factors.html

NB: not yet peer reviewed (4/6)
We found ~22% of the global population is at risk of severe COVID-19 disease due to underlying conditions.

The conditions (so far) were identified by UK & US as at risk of severe COVID-19 disease.

We don't yet know how much risk. We need to.

NB: not yet peer reviewed (5/6)
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