As of July 6, 2009
# United States, 33,902 cases and 170 deaths
# Mexico, 10,262 cases and 119 deaths
# Canada, 7,983 cases and 25 deaths
# United Kingdom, 7,447 cases and 3 deaths
# Chile, 7,376 cases and 14 deaths
# Australia, 5,298 cases and 10 deaths
# Argentina, 2,485 cases and 60 deaths
# Thailand, 2,076 cases and 7 deaths
# China, 2,040 cases and 0 deaths
# Japan, 1,790 cases and 0 deaths
During the 2009 pandemic of Swine Flu, the viral flu infection spread to all countries in the world-- a true pandemic.
Japan is a country that is most affected by them
All countries have been affected by the swine flu infections of their people. "Most" affected would have to be based on a definition of what is considered an affect and how to measure the affect. By percentages, the count of cases and deaths is relatively equal among countries, although perhaps North American countries have had the most affect. There may be some ongoing cases in limited locations around the world, however, even now. The specifics and counts of cases are no longer being tracked by CDC, WHO, the US states, and most other countries, now that the pandemic has been declared over, preventive vaccines are available, and people are educated on prevention. Influenza cases are monitored, but specific H1N1/09 counts (and the lab tests needed to isolate the specific virus to be able to count them correctly) aren't being done. Influenza cases in general are monitored, but statistics are not being kept for H1N1/09 cases separately from other influenza types for reporting any longer in the post pandemic phase.
Japan is a country that is most affected by them
All continents except Antarctica have been affected by tornadoes as have most, if not all countries. Many thousands of cities have been hit by tornadoes, far too many to list here.
Japan India
Most countries are not, but some are.
countries affected the most by tornados are the United States Of America, UK and Bangladesh. Although, tornados can spawn in almost any country that has the right variables. Europe, Southeast Asia, North America expereince the most tornados
The duration of the black plague was the 14th Century where many countries had been affected by this most devastating diseases
In the recent recession the main affected countries are The U.S.A ,Europe, Japan and China and Asia as well.
The three most affected were no doubt Germany, Poland and the Ukraine.
The form of internal migration that has affected most countries is people moving from rural areas to cities. Today, most of the world's population lives in a city.
India