Im not saying dont walk, but chest junk can develop into pneumonia. Mine was nasty.
It definitely can be easier on the lungs. I haven't tried it when sick but when healthy, I didn't get as winded especially when I wasn't used to running huge distances. I imagine it might be a good way to start back up if you don't feel you have the lung capacity that you had before. Like @Ariel484 said, do what works for you. If that is the way you feel most comfortable, do it. I think it is more important that you get moving as soon as you feel better. Even though you may lose some fitness, it comes back sooner than it took to get there in the first place. I think very few beginning runners can make it through a half or full marathon without a few walking breaks. It also helps to take the breaks before you feel so exhausted that you have to take them.
I think so. More time to catch your breath and all that. As you run longer you'll find that your cardiovascular system really improves and breathing gets easier...that's what happened for me anyway. I breathe better when running and I feel like I breathe more deeply and easily than I used to in general (not that I ever had breathing issues, just something I've nocticed...if that makes any sense). But as a newer runner just getting over an illness it might be tougher.
