Nine of them will be in developing countries: Mumbai, India – 27.4 million; Lagos, Nigeria – 24.4; Shanghai, China – 23.4; Jakarta, Indonesia – 21.2; São Paulo, Brazil – 20.8; Karachi, Pakistan – 20.6; Beijing, China – 19.4; Dhaka, Bangladesh – 19; Mexico City, Mexico – 18.8. The only city in a developed country that will be in the top ten is Tokyo, Japan – 28.7 million. "In 2008, Dr. Anna Tibaijuka, executive director of UN-HABITAT, referring to the recent report "State of the Worlds Cities Report 2008/2009", said that the world economic crisis we are in should be viewed as a "housing finance crisis" in which the poorest of poor were left to fend for themselves. Refuges and alternative accommodation
There are various places where a homeless person might seek refuge:

24-hour Internet cafes are now used by over 5,000 Japanese "Net cafe refugees". An estimated 75% of Japans 3,200 all-night internet cafes cater to regular overnight guests, who in some cases have become their main source of income. 24-hour McDonalds restaurants are used by "McRefugees" in Japan, China and Hong Kong. There are about 250 McRefugees in Hong Kong. Couch surfing: temporary sleeping arrangements in dwellings of friends or family members ("couch surfing"). This can also include housing in exchange for labor or sex. Couch surfers may be harder to recognize than street homeless people and are often omitted from housing counts.
However, these studies are subject to several methodological limitations, including sample size, the limited ability to detect adverse events, loss to follow-up, exemption of vaccine recipients with previous adverse events, observational bias, and the absence of unvaccinated control groups.By 2000, some 425,976 US service members had received 1,620,793 doses of AVA. The IOM review (2000-2004)
In October 2000, a committee of the Institute of Medicine (IOM) of the National Academy of Sciences was asked by the US Congress to review AVA according to the best available evidence. It issued its study in March 2002. The IOM panel noted that human data on inhalational anthrax prevention is limited due to the natural low incidence of disease and that therefore animal model data are the best we are ever likely to have. Primates and rabbits were considered the best models for human disease. As regards vaccine effectiveness, "The committee finds that the available evidence from studies with humans and animals, coupled with reasonable assumptions of analogy, show that AVA as licensed is an effective vaccine for the protection of humans against anthrax, including inhalational anthrax, caused by all known or plausible engineered strains of B. anthracis." With regard to safety, "The committee found no evidence that people face an increased risk of experiencing life-threatening or permanently disabling adverse events immediately after receiving AVA, when compared with the general population.