A process that happens if two different types of influenza virus infected a single cell and it can produce a new strain of influenza is called re-assortment. It will act as a “mixing vessel” in which re-assortment can occur between flu viruses of several species such as pigs are prone to influenza viruses that can also infect both humans and birds. This is because if the virus allows pieces of RNA from different viruses to mix together and form a novel type of virus as a new virus particles are being assembled from a virus splitting between eight independent pieces of RNA.
On the other hand, the World Health Organization raised the pandemic alert level from phase four to phase five, signaling that a pandemic is “imminent”.
To know more about different phases of Swine Flu as defined by the WHO, I enlisted six of them” defined by the WHO:
If a virus circulated among animals but there are no reported cases of infections to humans will fall under phase one. An example of this phase is an outbreak of flu symptoms in your hog race backyard.
In phase two there is an identified animal flu virus and caused infections to human, and it will be considered a potential pandemic threat.
An example is when the owner either the child or an adult within the hog race backyard got infected with a flu from their animal symptoms.
Phase 3 specified that a confirmed animal or human-animal flu virus has caused small outbreaks in human race, but has not resulted in human-to-human transmission that is sufficient to sustain community-level outbreaks. An example in this phase is when a child within the hog race backyard got infected together with his father, his mother and his siblings.
Radically in Phase 4, there is a cause of community-level outbreaks of human-to-human transmission of an animal or human-animal flu virus. This phase will focus to contain the spreading of the virus. The United Nations will then inform different countries asking to advice their people such as traveling to containment areas. All countries with infected with the swine flu must also consider in deploying a pandemic vaccine. An example of this when the infected family member went out from their backyard decided to talk to his friends and unaware that he’s spreading the virus.
In the 5th phase, if there are at least two countries in one region and spread the virus by means of human-to-human transmission. The signal of the pandemic is imminently strong. The infected countries are required to advise people with respiratory illnesses to stay home. There should be an advisory of suspension of classes. An example of this is when a man-infected virus either a family member or any of his friends travel to another neighboring country.
The sixth and final phase also called the pandemic phase. A pandemic phase is just like a spread of virus in phase 5 but extended at least one other country outside their geographic region. There must be an implementation of contingency plans of health systems in all levels. An example of this is when a man-infected virus travel to another continent.
Whatever phases of Swine Flu outbreak, we are experiencing in our country or geographic region we must prepare and prevent it to spread to lessen the death toll.