1. Ahlander J.&Pollard N.(2020).Swedish antibody study shows long road to immunity as Covid‐19 toll mounts.Reuters 20 May.https://www.reuters.com/article/us-health-coronavirus-sweden-strategy/swedish-antibody-study-shows-long-road-to-immunity-as-covid-19-toll-mounts-idUSKBN22W2YC(accessed 23 May 20220).
2. Bedford C.(2020).How and why America's food system is cracking.The Federalist 14 May.https://thefederalist.com/2020/05/14/how-and-why-americas-food-system-is-cracking/(accessed 3 May 2020).
3. Bruce A.(2020). Worst UK slump in ‘centuries’ looms as lockdown slams business.Reuters 23 April.https://www.reuters.com/article/us-britain-economy-pmi/coronavirus-brings-uk-economy-to-its-knees-in-april-pmi-idUSKCN22512Q(accessed 25 May 2020).