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.
Hubs to Include on Your Gap Year. These are some of the best cities in the world - make sure you try and factor at least one of them into your travels! Tokyo; city of flashing neon lights, super-advanced gadgetry, Hello Kitty and about 13 million people, which makes it one of the most densely populated cities in the world.