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.
Most experts rate Tokyo as the world's biggest city because of the size of the population in the larger urbanised area. Many of the 30 million people who are said to live in the city of Chongqing are actually agricultural workers living in a rural setting.