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 the 12th most populous country in the world, Mexico is home to approximately 120,286,655 people. The urban population in Mexico accounts for 79 percent of the total number of Mexican inhabitants. Mexico City is the country's most populous city, followed by Guadalajara at 4.77 million, Monterrey at 4.435 million and Puebla at 2.936 million.