If you have not yet delved into the works of Stephen King, particularly "The Stand", I highly recommend that you read "Swan Song" first. I can guarantee that you will be amazed and might even claim that it is superior. Although one story revolves around a virus and the other is set in the desolate aftermath of a nuclear world war, there are numerous comparisons that can be made. However, I firmly believe that both deserve an equal amount of credibility.
"Swan Song" is an absolutely awesome book. It is long, but trust me, it is definitely worth the investment of your time. It is a brilliant story that will not disappoint you in the slightest. The plot is engaging, the characters are well-developed, and the world-building is simply outstanding.
If you decide to read this novel, my advice is not to compare it to any other. Just go with the flow and let the story take you on its thrilling journey. I am confident that by the end, you will be extremely glad that you did. So, what are you waiting for? Pick up "Swan Song" and prepare to be captivated!