Conjunctivitis is a common and uncomfortable eye condition that can be caused by infections, allergies or irritants. The conjunctiva is thin clear tissue covering the front of the eye. One or both eyes may be affected, and the condition can spread from one to the other.
I'm assuming that by America you mean The United States. There's no country called America. Even when excluding Taiwan and other disputed territories, China is larger than the United States, both in terms of land area, and in terms of land area including inland waterbodies. By land area only: China: 9,326,410 sq km. United States: 9,161,966 sq km, 1.8% smaller than China.
The economy of the United States is the largest in the world. At $18 trillion, it represents a quarter share of the global economy (24.3%), according to the latest World Bank figures. Image: World Bank. China follows, with $11 trillion, or 14.8% of the world economy.