Signs and symptoms. The majority of HPV infections do not cause symptoms or disease and resolve spontaneously. However, persistent infection with specific types of HPV (most frequently types 16 and 18) may lead to precancerous lesions.
1. Tokyo, Japan: Tokyo tops the list and remains the world's largest city with 38 million dwellers. Though the UN has predicted a decline in the city's population, it will still remain the world's most populous city in 2030 with 37 million inhabitants. 2. Delhi, India: With 25 million, the Indian capital is the second-most populated city in the world.
Mexico City is identified as the most populous city in North America, with a population of 21,339,771. This is the second largest metropolitan area in the world, and the population continues to grow, at an annual rate of 1.8%. Mexico City has taken it place as not only the largest city in North America, but as the economic engine of the Mexican nation as well.