Level 106 have Morph Bubbles at both sides and in the middle there is an nasty infection going on. The great thing is that The Morph Bubbles can not be infected from Infected Bubbles! :D I coloured two Morph Bubbles with an orange pattern at the strategy picture to show you their position at level 106. They are right below the hideous infection, yet all safe, thanks to being polymorphic. This strategy picture also shows us where to clear bubbles at the very beginning of level 106, make a hole in the middle, so you can balk the infection.
Level 106 is mostly a training level for Morph Bubbles, but if you have unlocked the rainbow bubble you might want to use it as a helping booster anyway. If you have really big issues and can not access rainbow bubbles, go back and play other levels to collect 130 Stars.