It is no longer possible to contain the deadly swine flu virus first found in Mexico, the World Health Organization (WHO) says. As a potential pandemic edges closer, governments around the world have been stepping up precautions against its spread.
Africa
Americas
Asia-Pacific Europe
Middle East
South Asia
AFRICA
Ghana
The authorities have banned imports of pork and pork products. The country has drugs available and a quarantine system in place should any cases be identified.
Kenya
Officials are monitoring visitors who have come from infected areas such as the US, Canada, Israel, Spain and the UK.
Morocco
Official stocks of Tamiflu are sufficient for 1m of the 34m people who live there. Health and airport workers are being issued with gloves, surgical boots and masks.
Nigeria
In Africa's most populous state, health minister Babatunde Osotimehin told the BBC his government was increasing surveillance, providing information about the disease to the public and medical centres, and making sure there were sufficient supplies of anti-viral drugs. Nigeria was badly hit by bird flu three years ago.
South Africa
Response teams have been mobilised outbreak in all provinces. Tests on two women who became sick after returning from Mexico have both proved negative.
Sudan
The government has banned any person arriving directly from Mexico from entering the country. Transit passengers arriving from countries where problems relating to the disease were reported are kept in a room at the airport for 4 - 7 days. If a passenger shows symptoms then we will deal with all the passengers on the plane, local media reported a health official said. Sudan says it has the capability to treat 45,000 cases.
Uganda
The avian flu National Taskforce has been revived to deal with the new threat. Officials say they have 10,000 doses of Oseltamivir, a cheap generic version of Tamiflu, in stock.
Zambia
The authorities have formed an emergency task force to deal with a possible outbreak of swine flu.
Zimbabwe
Teams have been deployed at ports of entry to check for suspected flu cases. But Zimbabwe does not have enough drugs in stock to treat a swine flu outbreak. It is asking the regional WHO office for supplies.
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AMERICAS
Argentina
The health authorities have been ordered to watch for an increase in respiratory illnesses and to promote vaccinations and preventative hygiene habits among health workers and the public. Flight crews have been urged to tell the authorities immediately if they or passengers experience any flu-like symptoms on flights from Mexico. The immigration authorities have been asked to provide information about passengers who arrived from Mexico in the last 15 days. The health ministry has said the stocks of Tamiflu are enough to provide 500,000 treatments, the Argentine press reported.
Belize
This country on the Mexico's south-eastern border has ordered the cancellation of all major events which involve big public gatherings. These range from a reggae concert to the national agriculture and trade show, and performances by a visiting circus from neighbouring Guatemala.
Bolivia
The government has declared a "state of health alert". National director of epidemiology Eddy Martinez said the control mechanisms for swine flu are based on what was done to prevent bird flu. If a case of swine flu were found in Bolivia, health-service workers would be transferred to all airports and border areas, he said.
Brazil
Monitoring of passengers, initially restricted to those arriving from Mexico and US, has been extended to all international flights. The health ministry says it has the ability to handle 12,500 patients immediately; it has started to distribute medication giving priority to Rio de Janeiro and Sao Paulo, states which receive the highest number of passengers from abroad. The authorities are also building stockpiles of medicines in other cities such as Recife, where international flights also arrive.
Travellers arriving from the US and Mexico are being advised to avoid close contact with other people for the first 48 hours after their arrival. Arrivals from Mexico are having their luggage sterilised.
Canada
After cases were confirmed in Canada - all involving only mild illness - the government said it was stepping up surveillance for possible new cases and urged people to take precautions like frequent hand-washing.
TRAVEL TO MEXICO
Australia, Japan, New Zealand, Taiwan, South Korea, Singapore, Vietnam and Indonesia have issued advisories against travel to Mexico.
Japan advised its nationals in Mexico to consider returning home soon and has suspended visa waivers for Mexicans.
Health ministers from EU states have ruled out a co-ordinated suspension of flights to Mexico
Chile
All passengers arriving by plane from Mexico and the US are being scanned for signs of infection. The authorities have also warned against non-vital travel to Mexico and the US, and border officials are on alert to monitor passengers arriving by land who have flu-like symptoms.
Colombia
Increased monitoring and preventative controls are in place at hospitals, ports and Bogota's main airport, especially for people arriving from Mexico City, Texas and California.
Costa Rica
The authorities have declared a national health state of emergency after confirmed cases of swine flu in the central American country.
Cuba
Flights to and from Mexico are limited and officials are monitoring passengers arriving from Mexico. The island is updating its capabilities for epidemiological clinical surveillance and for providing treatment for the population through the public health system.
Ecuador
Health officials are carrying out medical checks on people with flu symptoms arriving via air and sea from affected countries. The country has banned imports of pigs and pork products from the US and Mexico.
El Salvador
Health officials in El Salvador are to watch for flu cases at the borders with Guatemala and Honduras.
Deaths from the swine flu virus have occurred in North America
Grenada
A team of medical officials at the international airport are checking passengers arriving in the Caribbean state for flu symptoms. Locals studying in Mexico have been told they cannot return immediately. One student and her Surinamese boyfriend who had already returned have been ordered to remain at home for a week while officials monitor them.
Guatemala
The country is able to provide 3,000 treatments with Oseltamivir to 1,500 adults and the same number of children. Health ministers from Guatemala, Nicaragua, Panama and Dominican Republic will seek to create a "sanitary cordon" in the region. Mexico's southern neighbour has prohibited imports of Mexican animals and agricultural goods.
Mexico
The swine flu outbreak originated in Mexico. President Felipe Calderon has assumed new powers to isolate infected people. He has ordered government offices and private businesses not crucial to the economy to stop work to avoid further infections from the new virus. People have been urged to stay at home from 1 - 5 May.
"There is no safer place than your own home to avoid being infected with the flu virus," Mr Calderon said.
All schools, gyms and courts have been closed, and restaurants in Mexico City have been ordered to serve only take-out food until 6 May to prevent contagion. Surgical masks have been given to the public in the capital.
Nicaragua
The health ministry has declared a health alert. All public activities, including those scheduled to mark International Workers' Day, have been suspended.
Panama
Airport officials are screening 40 flights a day from Mexico.
Peru
Airport controls have been reinforced in order to detect anyone with flu symptoms entering the country.
Trinidad and Tobago
The twin-island Caribbean state is increasing health checks on air travellers arriving from affected countries. The regional political grouping Caricom told the BBC its member countries have different levels of stockpiles and programmes of vaccinations against flu.
United States
The US was the second country to confirm flu cases; health officials have declared a public health emergency. President Barack Obama has said the outbreak is "cause for concern but not cause for alarm". The Centers for Disease Control and Prevention is sending out testing kits to US states so that individual state laboratories will be able to confirm their own cases of swine flu.
Inspections have been boosted at US borders and airports. Some schools have been closed in New York City, as well as Texas, California and other states where there have been confirmed flu cases.
The US has a stockpile of 50m courses of anti-viral drugs and has begun distributing the medication. It will spend $251m to buy 13m more courses of flu medicine.
The administration has ruled out closing the frontier with Mexico but the state department advises nationals against non-essential travel to the country.
Venezuela
Health controls at airports have been stepped up to try to prevent the contagion from spreading. Venezuelans have been recommended to avoid travel to the US and Mexico. Any potentially ill travellers - particularly from the US and Mexico - are being isolated until the cause of their disease is determined.
Stocks of the relevant medicines are also being built up. The ministry of agriculture says they are "closely inspecting" pig farms in the country and have suspended imports of pork and live pigs.
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ASIA-PACIFIC
Australia
Ministers have approved new powers to detain and disinfect people suspected of carrying swine flu. All incoming flights have to declare any suspected flu cases on arrival. Thermal scanners and extra medical staff are also being sent to airports for screening of incoming passengers. With 8.7 million doses of Tamiflu and Relenza drugs stockpiled, Australia has enough anti-viral drugs to cover about 41% of its 21m population. It also has large stores of surgical masks.
Cambodia
The authorities have taken protective measures including setting up thermal scanners at airports to check arriving passengers for possible swine flu cases. Prime Minster Hun Sen has made a personal plea for Cambodians to continue to eat pork as usual. "The infection does not come by eating pork," he said.
China
The authorities appear to have learned the lessons of previous deadly virus outbreaks such as the H5N1 avian flu and Sars (Severe Acute Respiratory Syndrome), and this time around have been quick to share information with the WHO. The central government has put in place a joint prevention and control system and hospitals have been told to report any suspected cases of swine flu swiftly. The official press is primed to report swiftly on cases of infection.
Citizens have been advised not to make tourist trips to Mexico and body temperature checks on passengers and crew at ports of entry have been re-introduced. Stockpiles of disease control equipment, anti-viral drugs and clinical equipment have been increased. China has also banned imports of pork and pork products from Mexico and the US states of Texas, Kansas and California.
Hong Kong
Hong Kong authorities have 20m doses of Tamiflu and other anti-flu medication, media reports say. Port health protection measures have been increased, including body temperature screening machines at all checkpoints.
Asia has recent experience of crises involving respiratory illnesses
Indonesia
Temperature scanners have been installed at 10 airports and ports with immediate effect. At least 3m Tamiflu capsules are in stock. Imports of pigs and pork products have been completely banned.
Japan
Passengers from Mexico, Canada and the US are being checked at international airports. Officials are inspecting all imported pigs across the country (about 420 pigs were imported in 2008). The central government has Tamiflu and Relenza combined stockpiles which would cover nearly 20% of the population. New supplies of anti-viral drugs to treat 8.3m people have been ordered. Local governments have their own stockpiles but figures are not available.
Kyrgyzstan
The import of meat products from the US and Mexico has been temporarily banned.
Malaysia
Tamiflu stockpile covering more than 2m people out of a population of 27m. It does not have a stockpile of personal protection equipment such as masks for the general population yet, but has a supply for health staff who will be dealing with any outbreak.
New Zealand
With the first confirmed cases in the region, public health officials say they have "ample stocks" of anti-flu drugs. The country built up a stockpile after the bird flu scare sufficient to cover 25-30% of the 4.3m population.
Philippines
Airports are equipped with thermal scanners, and additional medical staff have been hired. The government says it has enough Tamiflu for 60,000 possible cases and is buying 10m pesos ($206,000) worth of additional Tamiflu. This covers a fraction of the Philippine population of 90 million. Government says there are sufficient masks in stock.
Singapore
Anyone who has visited Mexico in the past seven days has been instructed to remain at home in self imposed quarantine for a week and to keep in contact by telephone with officials monitoring flu symptoms.
Thermal scanners are set up at airports and isolation units at hospitals, where staff at some emergency departments are wearing full protective clothing. Asean has 500,000 courses of anti-virals stockpiled in Singapore (and a similar amount distributed among member states).
South Korea
The agriculture ministry has suspended imports of live pigs from North America and recommended its nationals leave Mexico unless on urgent business. Health authorities have a Tamiflu stockpile for 2.5 million people and are working to increase that to 10% of the population of about 49 million.
Taiwan
Taiwan currently has supplies of swine flu treatment to cover 10% of its 23m population. More than 1m facemasks for emergency use are available.
Thailand
The government has 320,000 courses of Tamiflu stockpiled. GPO, a state-owned drug-maker, can produce 1m capsules of generic Tamiflu if needed. Temperature screening checkpoints are in place at international airports in Bangkok, Chiang Mai and Phuket. The main targets for the thermal scanners were passengers on eight routes - from France, Tokyo, Dubai, Frankfurt, London, Chicago, Los Angeles and Texas - which had connecting flights from Mexico. Suspected cases of new arrivals will be put under close surveillance for three to five days during their stay in Thailand.
Vietnam
Ho Chi Minh City, Vietnam's largest city of more than 8m people, has stocks of Tamiflu sufficient for a million people.
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EUROPE
Austria
The authorities have stocks of anti-viral drugs sufficient to treat 4m people (half the population), and have secured production capacity for prophylactic vaccines for the entire population. They have also stockpiled 8m protective masks.
Belgium
The country has 500,000 anti-viral treatments and the capacity to make 2m more. In addition, it has 32m masks for patients and 6m for healthcare professionals.
Bulgaria
Customs officers are checking the luggage of passengers arriving from Mexico, the US, Canada and Japan to ensure they are not importing pork products. Two thermal scanners have been installed at Sofia airport.
Czech Republic
The country has stocks of 2m doses of Tamiflu, enough to treat 20% of the population. General information on the viral strain has been circulated to hospitals, doctors and GPs. At Prague Airport, information boards on swine flu have been put up and medical examinations are available.
Denmark
A general pandemic plan has been in place since the bird flu scare. Denmark has stockpiled Tamiflu.
People in Europe, unlike this man, are not wearing masks generally
Finland
More than 90,000 doses of anti-viral medication have already been stockpiled. An additional 880,000 doses of the Relenza are to be acquired.
France
French nationals have been advised not to travel to Mexico. A national information campaign will be launched next week. Passengers arriving from Mexico will be tracked and their health checked. France has a stock of more than 30m anti-viral treatments, composed of 24m doses of Tamiflu and 9m doses of Relenza.
Germany
Nationals have been advised against non-vital travel to Mexico.
Greece
Passengers coming from countries where swine flu has occurred are being tracked and doctors at the airport will carry out checks. The country has "strategic stocks" of Tamiflu and other anti-viral medication.
Hungary
Medical imaging cameras have been installed in Budapest's main Ferihegy airport. The cameras are linked to computers which analyse the electromagnetic radiation of the human body to screen passengers for signs of the flu infection.
Italy
Pamphlets are being handed out to passengers at Rome's international airport, although there are no restrictions on travel. Italy has 10m doses of Zanamivir (Relenza) and 60,000 doses of Tamiflu, as well as enough Tamiflu powder to make 30m doses.
The Netherlands
The Dutch government is acquiring 19m doses of anti-viral medication.
Norway
A "pandemic committee" will be assembled this week. Authorities have stored flu medicine covering one-third of the 4.7m population.
Portugal
Has stocks of 2.5m doses of Tamiflu - enough for a quarter of the population.
Russia
Air crew arriving from the Americas have been told to look out for passengers with flu-like symptoms. Planes with suspected cases are sent to special airport zones, where passengers and crew can be examined by medics. Curbs have been imposed on meat imports from Mexico, a number of US states and the Caribbean.
Slovakia
With population of 5.4 million, it has around 700,000 doses of Tamiflu in official reserves.
Slovenia
The authorities have 500,000 doses of Tamiflu, which is sufficient to treat a quarter of the population.
Spain
The first European country to confirm a case of the virus, in a man who had recently returned from Mexico, Spain is distributing leaflets to other passengers arriving from there, advising them to report to a health centre if they suffer symptoms. Spain has a stockpile of 10m doses of Tamiflu. Flights to Mexico are being supplied with masks and gloves.
UK
Health ministry launches "Catch it, Bin it, Kill it!" campaign on tv, radio and internet to urge people to use tissues when they sneeze, dispose of them and then wash their hands. Leaflets giving advice about the new H1N1 swine flu virus are to be sent to every home in Britain. But health authorities are not advising the general public to wear masks.
A Scottish couple who spent their honeymoon in Mexico were the UK's first confirmed case of swine flu. The British government stresses it has enough anti-viral drugs to treat more than half the population if necessary.
Ukraine
Imports of live pigs and pork meat from countries where cases of swine flu have been recorded, including Mexico, the US, Canada and New Zealand, have been banned. All shipments received after 21 April will be subject to the ban.
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MIDDLE EAST
Egypt
A cull has been ordered of all pigs in the country. The animals are mainly eaten by members of the Coptic Christian minority in the largely Muslim state.
Experts say the flu cannot be caught from eating pig meat, and there is no scientific rationale for slaughtering pigs or banning pork.
The authorities have increased numbers of medical staff at Cairo airport to check passengers arriving from Mexico and will monitor them during their stay.
Israel
The Israeli government has stepped up preventive measures ordering travellers returning from Mexico to undergo medical checks at airports or other points of entry. A "crisis cell" has been formed in the defence ministry to deal with the outbreak were the disease to spread inside the country. Israel, Jordan and the Palestinian Authority will hold a joint meeting "to discuss ways to prevent the spreading of the epidemic," Israel's foreign ministry announced.
Jordan
The health ministry has set up a telephone advice line to answer question about the disease and its symptoms; a pamphlet on the disease will be distributed in hospitals and health centres. A medical team is screening air travellers arriving from flu-infected areas.
Kuwait
The government has 10m capsules of Tamiflu, enough for 1m flu patients, roughly the number of Kuwaitis. Of the 3.44m people who live in the state 2.35m are foreigners.
Lebanon
Among the reported measures to prevent contagion, Health Minister Mohammad Khalifeh has issued advice for schools and employers and suggested people should avoid "social kissing".
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SOUTH ASIA
Bangladesh
Travellers, particularly those coming from countries already hit by swine flu, are to be screened by teams comprising medical officers, epidemiologists and representatives from the WHO and the International Centre for Diarrhoeal Diseases Research in Bangladesh.
India
Preventative measures such as surveillance at ports and nine international airports have been taken, and people have been advised to defer non-essential travel to the affected areas. About 50,000 passengers who have come from countries affected by swine flu have been traced and checks would be carried out on them, a senior health official Vineet Chaudhary said.
The states within India have been advised to review their preparedness to investigate and contain any suspected cluster of swine flu cases, with central government providing expert, logistics and laboratory support. A toll-free call centre number has been set up for the public to report incidents of illness.
An Indian newspaper reports that the drug company Cipla has received orders from Latin America, Mexico and Israel for the anti-viral Tamiflu. India has stockpiles of 1m Tamiflu doses and is taking steps to stockpile up to 10m doses.
Nepal
Visitors from the US and Mexico will be screened, local media report. A team of health professionals will be stationed at Tribhuvan International Airport with a health-related questionnaire and take immediate action if anyone is suspected to have contracted the flu.
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Sources: Reuters and other news agencies, BBC World Service, BBC Monitoring
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What would be the purpose of that??? 
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