The 2009 swine flu pandemic, involving an outbreak of a new strain of influenza commonly known as swine flu, reached Germany in April 2009.
Two men and a woman from Bielefeld who had been firstly suspected of having the virus tested negative on influenza type A. [1]
On 29 April, the first case of swine flu in Germany was confirmed by the Robert Koch Institute in the area of Regensburg. [2] [3] [4] A 22-year-old woman from Hamburg is also confirmed to have been infected by swine flu during a trip to Mexico. [4] A 37-year-old woman from Kulmbach is also confirmed to have become infected during a similar trip. [4]
On 1 May, the Robert Koch Institute confirmed the first case of human-to-human transmission of swine flu in Munich. A nurse who had contact with one of the infected people was infected with the virus. At approximately 10:00 she was claimed to be already healed. [5] At 13:00 one additional infection in Bavaria was confirmed, but the patient was also claimed to be healthy again. [6]
On 2 May, a new human-to-human infection, in the same hospital in Munich, was confirmed. The new patient, who was in the same room with the original infected German that came from Mexico, is currently being reported to show no signs of the new influenza strain anymore. [7]
On 3 May, two further cases of swine flu in Brandenburg were reported. Two people from the same flight as patient in Hamburg were also infected. [8]
On 5 May, one new case in Saxony-Anhalt has been confirmed bringing to 9 [9] the total number of people infected.
On 7 May, another new case in Saxony-Anhalt is reported. [10]
On 8 May, an adult male living in Bavaria who had recently been to United States. [11]
On 11 May, the case of a 27-year-old Bavarian woman, who stayed for some weeks in Mexico and medicated patients in a hospital, is reported. [12]
On 15 May, two more cases were reported, a female and her son from Saxony-Anhalt were obviously infected by her husband / his father, who returned from Mexico. [13]
On 21 May, a case was found in a 43-year-old woman from Düsseldorf in North Rhine-Westphalia who returned from New York. [14] One day later, Robert Koch Institute confirmed that her husband has been tested positive with swine influenza too. Furthermore, their six-year-old daughter, who did not stay in New York, has been infected by her parents, bringing the total to 17. [15]
Until 5 June 2009, the total number of confirmed cases increased to 49. Most of them have been recent travellers to Mexico, the US or the UK. However, there was also a single-digit number of (isolated) in-country-transmissions.
As of 6 November 2009, the number of infections increased to 29,900 with nine deaths caused by the flu.
State | Confirmed cases | Confirmed cases followed by death |
---|---|---|
Bavaria | 25,280 | 11 |
North Rhine-Westfalia | 15,769 | 11 |
Baden-Württemberg | 10,258 | 2 |
Lower Saxony | 10,205 | 1 |
Rhineland-Palatinate | 5,027 | 1 |
Hesse | 4,130 | 1 |
Saxony | 2,182 | 1 |
Thuringia | 2,113 | 0 |
Saxony-Anhalt | 2,050 | 0 |
Hamburg | 2,034 | 0 |
Berlin | 1,580 | 1 |
Schleswig-Holstein | 1,476 | 0 |
Brandenburg | 1,040 | 0 |
Bremen | 866 | 0 |
Mecklenburg-Vorpommern | 680 | 0 |
Saarland | 600 | 1 |
Total | 85,290 | 30 |
Swine influenza is an infection caused by any of several types of swine influenza viruses. Swine influenza virus (SIV) or swine-origin influenza virus (S-OIV) refers to any strain of the influenza family of viruses that is endemic in pigs. As of 2009, identified SIV strains include influenza C and the subtypes of influenza A known as H1N1, H1N2, H2N1, H3N1, H3N2, and H2N3.
In virology, influenza A virus subtype H1N1 (A/H1N1) is a subtype of influenza A virus. Major outbreaks of H1N1 strains in humans include the 1918 Spanish flu pandemic, the 1977 Russian flu pandemic and the 2009 swine flu pandemic. It is an orthomyxovirus that contains the glycoproteins hemagglutinin (H) and neuraminidase (N), antigens whose subtypes are used to classify the strains of the virus as H1N1, H1N2 etc. Hemagglutinin causes red blood cells to clump together and binds the virus to the infected cell. Neuraminidase is a type of glycoside hydrolase enzyme which helps to move the virus particles through the infected cell and assist in budding from the host cells.
The 2009 swine flu pandemic, caused by the H1N1/swine flu/influenza virus and declared by the World Health Organization (WHO) from June 2009 to August 2010, was the third recent flu pandemic involving the H1N1 virus. The first identified human case was in La Gloria, Mexico, a rural town in Veracruz. The virus appeared to be a new strain of H1N1 that resulted from a previous triple reassortment of bird, swine, and human flu viruses which further combined with a Eurasian pig flu virus, leading to the term "swine flu".
The 2009 flu pandemic in the United States was caused by a novel strain of the Influenza A/H1N1 virus, commonly referred to as "swine flu", that was first detected on 15 April 2009. While the 2009 H1N1 virus strain was commonly referred to as "swine flu", there is no evidence that it is endemic to pigs or of transmission from pigs to people; instead, the virus spreads from person to person. On April 25, the World Health Organization declared a public health emergency, followed concurringly by the Obama administration on April 26.
The 2009 swine flu pandemic in Canada was part of an epidemic in 2009 of a new strain of influenza A virus subtype H1N1 causing what has been commonly called swine flu. In Canada, roughly 10% of the populace has been infected with the virus, with 428 confirmed deaths ; non-fatal individual cases are for the most part no longer being recorded. About 40% of Canadians have been immunized against H1N1 since a national vaccination campaign began in October 2009, with Canada among the countries in the world leading in the percentage of the population that has been vaccinated. The widespread effect of H1N1 in Canada raised concerns during the months leading to the XXI Olympic Winter Games, which took place in Vancouver in February 2010.
This article covers the chronology of the 2009 novel influenza A (H1N1) pandemic. Flag icons denote the first announcements of confirmed cases by the respective nation-states, their first deaths, and relevant sessions and announcements of the World Health Organization (WHO), the European Union , and the U.S. Centers for Disease Control (CDC).
In March and April 2009, an outbreak of a new strain of influenza commonly referred to as "swine flu" infected many people in Mexico and other parts of the world, causing illness ranging from mild to severe. Initial reports suggested that the outbreak had started in February due to farming practices at a pig farm half-owned by Smithfield Foods. Smithfield Foods stated that it had found no clinical signs or symptoms of the presence of swine influenza in the company's swine herd, or among its employees at its joint ventures in Mexico, that it routinely administers influenza virus vaccination to their swine herds and that it conducts monthly testing for the presence of swine influenza. The new strain was identified as a combination of several different strains of Influenzavirus A, subtype H1N1, including separate strains of this subtype circulating in humans and in pigs.
The 2009 swine flu pandemic was a global outbreak of a new strain of influenza A virus subtype H1N1, first identified in April 2009, termed Pandemic H1N1/09 virus by the World Health Organization (WHO) and colloquially called swine flu. The outbreak was first observed in Mexico, and quickly spread globally. On 11 June 2009, the WHO declared the outbreak to be a pandemic. The overwhelming majority of patients experienced mild symptoms, but some persons were in higher risk groups, such as those with asthma, diabetes, obesity, heart disease, who were pregnant or had a weakened immune system. In the rare severe cases, around 3–5 days after symptoms manifest, the sufferer's condition declines quickly, often to the point of respiratory failure.
This article deals with the status and efforts regarding the 2009 swine flu pandemic by country and continent/region.
In March and April 2009, an outbreak of a new strain of flu, popularly known as swine flu, was discovered to have infected several people in Mexico and the states of California and Texas in the United States. On April 28 Costa Rica became the first Central American country to report the outbreak of the virus, with a confirmed infection. As of November 4 the Costa Rican Ministry of Health had 1,596 confirmed cases, 1,275 pending cases, 8,000 already discarded, and 38 deaths.
The pandemic H1N1/09 virus is a swine origin influenza A virus subtype H1N1 strain that was responsible for the 2009 swine flu pandemic. This strain is often called swine flu by the public media due to the prevailing belief that it originated in pigs. The virus is believed to have originated around September 2008 in central Mexico.
The 2009 swine flu pandemic in Brazil began on April 25, 2009, with two people, spreading to 34 over the first two weeks. CDC calculate that Africa and Southeast Asia, which have 38% of the world's population, accounted for a disproportionate 51% of the deaths.
The 2009–2010 flu pandemic in Norway marked the initial phase of a new influenza pandemic. This pandemic began in the spring of 2009, the illness appeared in tourists returning from affected areas. By the summer of 2009, local person-to-person transmission within Norway was established. Soon thereafter, the number of patients being tested for swine flu exceeded capacity, and authorities recommended that only patients with severe symptoms be tested. The first Norwegian death from swine flu was reported in early September 2009.
The 2009 flu pandemic in Asia, part of an epidemic in 2009 of a new strain of influenza A virus subtype H1N1 causing what has been commonly called swine flu, afflicted at least 394,133 people in Asia with 2,137 confirmed deaths: there were 1,035 deaths confirmed in India, 737 deaths in China, 415 deaths in Turkey, 192 deaths in Thailand, and 170 deaths in South Korea. Among the Asian countries, South Korea had the most confirmed cases, followed by China, Hong Kong, and Thailand.
The 2009 swine flu pandemic in North America, part of a pandemic in 2009 of a new strain of influenza A virus subtype H1N1 causing what has been commonly called swine flu, began in the United States or Mexico.
The 2009 flu pandemic in Oceania, part of an epidemic in 2009 of a new strain of influenza A virus subtype H1N1 causing what has been commonly called swine flu, has afflicted at over 22,000 people in Oceania, with 56 confirmed deaths. Almost all of the cases in Oceania have been in Australia, where the majority of cases have resulted from internal community spread of the virus. In addition, the government of New Zealand, where most of the remainder of cases in Oceania have occurred, is on high alert for any people travelling into the country with flu-like symptoms.
The 2009 flu pandemic in Europe was part of a pandemic involving a new strain of influenza, subtype H1N1. H1N1 is commonly called swine flu. The pandemic infected at least 125,550 people in Europe. There were 458 confirmed deaths in Turkey, 438 confirmed deaths in Russia, and 457 confirmed deaths in the United Kingdom.
The 2009 flu pandemic hit Africa two months later than other continents with the first case reported in Egypt on June 2, 2009. As of December 1, 30 countries in Africa had reported cases and 7 countries in Africa had reported a total of 108 deaths. It was the least affected continent.
The United States experienced the beginnings of a pandemic of a novel strain of the influenza A/H1N1 virus, commonly referred to as "swine flu", in the spring of 2009. The earliest reported cases in the US began appearing in late March 2009 in California, then spreading to infect people in Texas, New York, and other states by mid-April. Early cases were associated with recent travel to Mexico; many were students who had traveled to Mexico for Spring Break. This spread continued across the country's population and by the end of May there were approximately 0 confirmed cases throughout all 50 states.
The 2009 swine flu pandemic in New Zealand was caused by a novel strain of the A/H1N1 influenza virus. A total of 3,175 cases and 69 deaths were recorded, although a seroprevalence study estimated that around 800,000 individuals may have been infected during the initial wave of the pandemic.