Sinusitis is an inflammation of the sinuses. It is often caused by bacterial (germ) infection. Sometimes, viruses and fungi (molds) cause it. People with weak immune systems are more likely to develop bacterial or fungal sinus infection. Some people with allergies can have allergic fungal sinus infection. Acute sinus infection lasts three to eight weeks. A sinus infection lasting longer than eight weeks is considered chronic.
Define Upper stage. Upper stage synonyms, Upper stage pronunciation, Upper stage translation, English dictionary definition of Upper stage. n. A rocket composed of two or more propulsion units that fire in succession. Also called step rocket . Noun 1. multistage rocket - a rocket having two or...
Dragon Egg: This stage is when the dragon is still being hatched. Baby Dragon: This stage is from level 1-4 when the dragon is still in his baby form. Teen Dragon: The dragon evolves into this stage when he reaches level 4 to become even more powerful. Adult Dragon: The dragon evolves into its adult form at level 7.