ISLAMABAD: Pakistani health authorities on Monday confirmed the presence of the H3N2 influenza strain, often referred to as a fast-spreading “super flu,” in the country, but stressed there was no cause for panic, saying the virus is not new and remains manageable with standard treatment and vaccination. Officials said the strain is part of seasonal influenza viruses that circulate globally each year and has undergone genetic changes that make it spread more quickly, a pattern health experts say is common for influenza.