The next Stan Conference is on August 13, 2020.
It’s a 24-hour virtual event. There are 3 sessions spaced 8 hours apart, each session has a plenary and 6 contributed talks. There isn’t too much focus on biostats this year, but there are quite a few epidemiology talks. See the program.
Registration is $50, there are scholarships available: https://stancon.mc-stan.org