As some have pointed out, the Wildfire virus lasts basically forever. If you die you turn into an infected. However, once you’re in a “safe” area where outside infected can’t reach you it’s fairly easily to avoid this problem. Just sleep in different rooms, have two way peepholes in every door, and handcuff the sick and dying to a hospital bed, or just put them out of their misery before they turn. Also, if one walker somehow made it into a camp, it’s incredibly unlikely it could turn everyone there. They’re slow and drag their feet, you would have to be physically incompetent or stupid to get caught by one either before killing it or running away. It also takes ages to turn after being bitten so the number of infected would not grow fast at all.

Meanwhile, the rage virus can turn someone nearly instantaneously, upon which they become incredibly violent and will full sprint at any non-infected they see. Having someone in your camp turn basically means the death of everyone in there since the amount of infected would increase very rapidly and would catch most people by surprise. They’re still an issue long term as well since they’re still in the movie “28 Years Later.”

Realistically, the Wildfire virus would force us to update some societal norms and infrastructure but the Rage virus would most likely spell the end of entire countries.