How does a flu pandemic occur
A pandemic is the worldwide spread of a new disease. An influenza pandemic occurs when a new influenza virus emerges and spreads around the world, and most people do not have immunity.Viruses that have caused past pandemics typically originated from animal influenza viruses. pandemic is the worldwide spread of a new disease. An influenza pandemic occurs when a new influenza virus emerges and spreads around the world, and most people do not have immunity. A pandemic is a global disease outbreak. It is determined by how the disease spreads, not how many deaths it causes. When a new influenza A virus emerges, a flu pandemic can occur.Because the virus is new, the human population has little to no immunity against it.The virus spreads quickly from person-to-person worldwide.The United States is not currently experiencing a flu pandemic. If a pandemic occurs, the federal government will work to identify the cause and create a vaccine.Flu.gov will provide updates on the steps the federal government is taking to address the pandemic.he United States is not currently experiencing a flu pandemic. If a pandemic occurs, the federal government will work to identify the cause and create a vaccine. Flu.gov will provide updates on the steps the federal government is taking to address the pandemic. An influenza pandemic is an epidemic of an influenza virus that spreads on a worldwide scale and infects a large proportion of the human population. In contrast to the regular seasonal epidemics of influenza, these pandemics occur irregularly, with the 1918 Spanish flu the most serious pandemic in recorded history.nfluenza, commonly known as the flu, is an infectious disease of birds and mammals caused by an RNA virus of the family Orthomyxoviridae (the influenza viruses). In humans, common symptoms of influenza infection are fever, sore throat, muscle pains, severe headache, coughing, and weakness and fatigue. Influenza pandemics occur when a new strain of the influenza virus is transmitted to humans from another animal species. Species that are thought to be important in the emergence of new human strains are pigs, chickens and ducks.nfluenza, commonly known as the flu, is an infectious disease of birds and mammals caused by an RNA virus of the family Orthomyxoviridae (the influenza viruses). In humans, common symptoms of influenza infection are fever, sore throat, muscle pains, severe headache, coughing, and weakness and fatigue. An influenza pandemic is a global outbreak of disease that occurs when a new influenza A virus appears or “emerges” in the human population, causes serious illness in people, and then spreads easily from person to person worldwide. Pandemics are different from seasonal outbreaks or “epidemics” of influenza.or pandemic influenza to occur, three conditions must be met: a new influenza A virus appears or “emerges” in the human population, it causes serious illness in people, and it spread easily from person to person worldwide. There is currently no pandemic influenza in the world. A pandemic influenza is a worldwide outbreak of disease that occurs when a new influenza virus appears in humans, causes serious illness and then spreads easily from person to person worldwide. pandemic is cause by a new virus that people have not been exposed to, so everyone is susceptible. Pandemic influenzas can cause more serious disease and many more deaths than the seasonal flu. Because of this, past pandemics have led to high levels of illness, death, disruption of society and economic loss. An influenza pandemic can occur when a non-human (novel) influenza virus gains the ability for efficient and sustained human-to-human transmission and then spreads globally.Influenza viruses that have the potential to cause a pandemic are referred to as ‘influenza viruses with pandemic potential.’.n influenza pandemic can occur when a non-human (novel) influenza virus gains the ability for efficient and sustained human-to-human transmission and then spreads globally. One strain of virus that may produce a pandemic in the future is a highly pathogenic variation of the H5N1 subtype of influenza A virus. On 11 June 2009, a new strain of H1N1 influenza was declared to be a global pandemic (Stage 6) by the WHO after evidence of spreading in the southern hemisphere.nfluenza, commonly known as the flu, is an infectious disease of birds and mammals caused by an RNA virus of the family Orthomyxoviridae (the influenza viruses). In humans, common symptoms of influenza infection are fever, sore throat, muscle pains, severe headache, coughing, and weakness and fatigue. Influenza type C usually causes a very mild disease, often without symptoms. Only type A influenza causes pandemics in humans. Certain conditions have to be met for a pandemic to occur: 1  A new influenza A virus (that is the result of a major change to the virus) is present.2  A virus that is easily passed from human to human. 3  The virus is able to cause serious illness or death.nfluenza type C usually causes a very mild disease, often without symptoms. Only type A influenza causes pandemics in humans. Certain conditions have to be met for a pandemic to occur: 1  A new influenza A virus (that is the result of a major change to the virus) is present. The Swine Influenza (swine flu) is a respiratory disease of pigs caused by type A influenza viruses (H1N1) that causes regular outbreaks in pigs. People do not normally get swine flu, but human infections can and do happen as indicated with the current worldwide outbreak.pread of this swine influenza A (H1N1) virus is thought to be happening in the same way that seasonal flu spreads. Flu viruses are spread mainly from person to person through coughing or sneezing of people with influenza.
It occurs when a new influenza virus appears in humans, causes serious illness and then spreads easily from person to person worldwide.