"COVID-19 starts out in the lungs like the common cold coronaviruses, but then causes havoc with the immune system that can lead to long-term lung damage or death."
"Urbanization in the developing world is bringing more and more rural residents into denser neighborhoods, while population increases are putting greater pressure on the environment. ... These macro trends are having a profound impact on the spread of infectious disease."
"...in contrast with the common flu, the Wuhan coronavirus has a far higher serious complication rate, a higher case fatality rate, and a higher level of transmissability, meaning that it has the potential to be considerably more deadly."