Anyway, if you're about to make an infographic with that design, I think using Photoshop is fine and enough.
It's easy to use Photoshop because CC isn't complex, unlike CS where shortcuts are having difficulties.
You will just use .png flat icons and shapes, text for the little information you wanted to give.
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The infographics of the OP are pixelated because maybe she/he saved it through phone or screen capture. If the picture is in high quality then it will maximize the space on the OP.