Hundreds of flights have been cancelled. Tourists are stranded, quarantined in their hotels. World stock markets are in freefall, and there are reports of desperate shoppers stockpiling crates of supplies – from nappies to medicines to toilet roll. Sales of surgical spirit have surged and Boots announced it has sold out of anti-bacterial hand gel. There’s even talk of cancelling – not just postponing – the Olympics. It’s hard not ...