4minute's HyunA posted the above photo of herself via her Twitter page with the caption, "Be careful, it's flu season!" HyunA is seen wearing a white mask in the photo and fans everywhere were concerned for her health. The mask also covered more than half her face, proving just how small her face really is. Netizens commented on the photo with, "Get better soon", "You should've been more careful!", "Your face is so tiny", and "Your eye smile is so pretty". Source & Image : StarNews