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.
As a stand-alone country, in 2013, Mexico City would be the fifth-largest economy in Latin Americaâfive times as large as Costa Rica's and about the same size as Peru's. Mexicoâs capital is both the oldest capital city in the Americas and one of two founded by Amerindians (Native Americans), the other being Quito.