Yep, 24 months is the expiration on most first aid courses (Resct Right, EFR etc etc). Never looked at it online, but in my understanding there is a practical element to the course (CPR, rescue breaths etc), so not sure how you'd do it entirely on line. I also have to admit that I'm not a huge fan of online learning for any course in general. They teach you what you need to know, but I think you get much more supplementary information, knowledge and feedback from a living, breathing person with lots of experience in the given area of study.
