Chickenpox is an illness caused by the varicella zoster virus (VZV), which is a member of the herpesvirus family.The illness lasts between 5 and 10 days causing an itchy, blister-like rash, fever, headache, fatigue, and loss of appetite.hickenpox is an illness caused by the varicella zoster virus (VZV), which is a member of the herpesvirus family.
Mexicoâs ten largest cities (2009 population) are: Mexico City 19,982,000 (Metropolitan Area) Guadalajara 4,365,000. Monterrey 3,986,000. Puebla 2,647,000.
Mexico City, Nahuatl MÃ©xico, Spanish Ciudad de MÃ©xico or in full Ciudad de MÃ©xico, D.F., city and capital of Mexico, synonymous with the Federal District (Distrito Federal; D.F.). The term Mexico City can also apply to the capitalâs metropolitan area, which includes the Federal District but extends beyond it to the west, north, and east, where the state (estado) of MÃ©xico surrounds it on three sides.