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I assume that you are using one long clip rather than having detected and generated 'scenes' but the principle would be the same.
1. Cut the clip at the end of the part that is 'red'
2. Apply your correction only to the red part.
3. If there is a gradual change from red to no red you may have to do more than one cut.
4. You may also have to do a 'transition' to blend the corrected to the non corrected so that the change is less noticeable.
BTW - I am really only a newbie and there seems to be a lot to learn when you start playing around with colour correction; I'm not to bad on contrast/brightness but colour is a different ballgame ;-)
Here is something I posted back in 2007.
When there is an overall color cast, I think the Tint effect does a pretty good job of cleaning that up. It would be nice if there were adjustments for highlights, shadows, and midtones.
What I do is take the white eyedropper and sample an area that I think is suppose to be neutral -- not the bright or dark areas -- somewhere in the midtones. Then I click on the color swatch and change the HSB values by subtracting or adding 180 from the (H)ue value to get the inverse. Then I increase the (B)rightness to 100 and (S)aturation to 100. Click OK.
Next move the tint slider to 50%.
I then go back in to the color swatch and increment the hue one degree and check the results. I keep doing that a few times. When it's about as good as I think I can get it, I add the Auto Contrast effect. Then I fiddle with the white point, black point, and blend values. Temporal smoothing may also help with video.
It's not perfect.