What is the H1N1 virus?
The H1N1 virus is a type A flu virus and in humans is the most common cause of influenza. In 2006, for example, the types of influenza H1N1 caused approximately 50% of all cases of influenza. While most H1N1 tribes are relatively harmless, there are several cases where the focus of the more virulent H1N1 tribe has been focused. Such outbreaks were recorded for the last time in 1918 and 2009. The last two are often referred to as pig flu and bird or bird flu. It is known that different tribes of human influenza H1N1 virus cause a large percentage of seasonal influenza epidemics that occur in the colder months of each year. In most cases, these seasonal epidemics are not dangerous, with the exception of very young or very old.
The first occurrence of the outbreak of pandemic influenza H1N1 appeared in 1918. This outbreak of flu type A was then referred to as Spanish flu, but it was not known that the virus came from Spain. Instead the name was stuck because Spain was the only countryIn Europe that did not push the news of thousands of men who died of the flu while fought in the First World War. Other countries felt the news would be too demoralizing.
The Spanish flu from 1918 was killed between fifty and one hundred million people in about twelve months. It is assumed that this H1N1 virus strain was particularly virulent because it caused a storm of cytokines. This happens when elevated cytokine levels create a loop of feedback that causes the immune response to the virus almost infinitely escalating. In the case of Spanish flu, this resulted in a massive migration of immune cells on the lungs, leading to extensive lung damage, which was usually fatal.
Young adults were more at risk of dying than children or seniors durni Spanish flu pandemic from 1918. It is assumed that this is the case because young adults were most able to mount evena mitic response that will be more likely to lead to a storm of cytokines. Weaker immune systems of very young and very old have provided them with some degree of protection.
In 2009, a new outbreak of H1N1 virus was reported. This new H1N1 influenza virus, which was initially referred to as pig flu, was confirmed as a re -overview of genes from four types. Four trunks include one known to be endemic in humans, as well as one bird flu tribe and two different pigs. The World Health Organization officially declared the outbreak of H1N1 as the pandemic of June 11, 2009 and noted that the statement was caused by rapid expansion of the virus and not at the risk of mortality.
Influenza infection with H1N1 causes expected symptoms of influenza such as fever, chills, headache, muscle and joint pain and fatigue. Vomiting also diarrhea, cough and cold and nose. Small children, older people, pregnant women and people with health such as asthma, heartbeatDiseases and diabetes may have an increased risk of serious symptoms of H1N1 virus.
The 2009 H1N1 pandemia was established in Mexico, where it is believed that the virus could spread between the population several months before spreading to other countries. Research shows that this particular H1N1 strain circulated between pigs in North America and Europe several years before transmission to humans. It is assumed that cycling of the virus between different pig populations has facilitated the extensive mutation that this particular strain has gone through.