1. Epidemics (Especially Ebola)
2. Alexander S.et al.2020. Jeff Bezos gains $24 million while world's rich reap bailout rewards.Bloomberg News Service 14 April.
3. Altucher J.2010. Profiting from disasters.The Wall Street Journal 12 April.
4. Angst M.&T.Vo2019. Homeless population spiked in some South Bay cities.San Jose Mercury News 16 July.
5. Barreto Briso C.&T.Phillips2020. Brazil gangs impose strict curfews to slow coronavirus spread.The Guardian 25 March.