[ashwoods]

I think Climate change, population growth, travel, antimicrobial resistance are all good candidates in increasing the risk of this happening more often.

[Roark66]

Everything else, yes, but climate change? I can't imagine how climate change can significantly affect probability of next pandemic.

[underwater]

Displaced people? Displaced animal populations?

[JohnBooty]

Also, warmer temperatures will benefit a lot of diseases in a lot of places.