What numbers really are needed to make the ACA sustainable? This is a big concern of Rep. Tim Bishop’s and others who fear that too few healthy young people paying in to offset older, sicker enrollees, may drive premiums higher next year. The doom and gloom over fairly low numbers of young adults enrolling in the exchanges is exaggerated, says research by the Kaiser Family Foundation, a leading non-partisan think tank on health policy.

Here’s their analysis on how many enrollees are needed to make the math work and keep premiums reasonable. The number is lower than we think.  Contributed by Liz McMillan.