Given the question: Read the following article and select the best answer. Article: (1) Liu Xiang got another gold medal in the 110m hurdles at the East Asian Games (EAG) in Macao last Wednesday. The 22-year-old Liu defended his EAG title in 13.21 seconds, beating Shi Dongpeng (13.36) and Japan's Kota Kumamoto (13.89). His winning time was 0.16 seconds behind his top time this year and a further 0.08 behind this season's best: 12.97 set by Frenchman Ladji Doucoure, who beat Liu into second place in the world championships. (2) Over 30,000 people were killed in the huge earthquake that took place in India, Pakistan and Afghanistan on October 8. Millions were left homeless after the quake destroyed houses, cutting off power and water. The international community has responded to the countries' call for help. China has sent a rescue team, along with money and relief materials . But because of bad weather, it is difficult for them to reach those in remote areas. The United Nations warned of a possible outbreak of infectious diseases . Question: According to the United Nations, what will possibly happen? - Another bigger earthquake. - Flood. - Infectious disease. - Drought.
The answer is:
Infectious disease.