COVID-19 has revealed some real weakness in our global health supply chains. Just-in-time ordering and lean systems are great, when things are going well. But in a time of crisis it means we don’t have any reserves. If a hospital or a country runs out of facemasks, or personal protective equipment, there’s no warehouse full of boxes that we can go to get more. You have to order more from the supplier, wait for them to produce it, and you have to wait for them to ship it – generally from China. That’s a time lag, in a time when it’s most important to move quickly.