https://news.yahoo.com/health-experts-issued-ominous-warning-170400102.html

A scientist at Johns Hopkins last year modeled what would happen if a deadly coronavirus reached a pandemic scale. His simulated scenario predicted that 65 million people could die within 18 months....
Toner's simulation imagined a fictional virus called CAPS. The analysis, part of a collaboration with the World Economic Forum and the Bill and Melinda Gates Foundation, looked at what would happen if a pandemic originated in Brazil's pig farms. (The Wuhan virus originated in a seafood market that sold live animals.)

The virus in Toner's simulation would be resistant to any modern vaccine. It would be deadlier than SARS, but about as easy to catch as the flu.