The flu virus causes epidemics because so many people are infected at one time.
Flu is always caused a virus, not bacteria, so no flu epidemic will be due to a bacterial agent. This is true of the 1918 "Spanish Flu", it was caused by a virus.
virus, epidemic, cold, the flu
Viral diseases are most likely to cause epidemics. The recent H1N1 flu virus is one example of this. One other major epidemic, which is not of infectious disease origin, is the obesity epidemic in the U.S.
Avian Flu is caused by the virus like Flu virus in man. This virus has evolved with birds.
A flu epidemic is when a lot of people get the flu in a large area.
The flu epidemic.
Influenza is caused by a virus. its straight up a virus...
No, you cannot get the flu from receiving the flu shot. The flu shot contains inactivated virus particles that cannot cause the flu.
The Swine Flu epidemic hit the United Kingdom in 2009. This strain was the H1N1 virus; previous influenza types had hit the world since 1918.
the most dangerous flu on Earth is h5n1 the bird flu it kills 60% of the people it infects. This virus mutated from a virus that could only affect birds, H5n1 is an epidemic across asia. The h1n1 flu is the next most dangerous flu. In the United States it's become an epidemic. The Swine flu h1n1 does not have a high death rate and this virus mutated from a virus that only affected swine or pigs. Most people that get h1n1 flu don't die, but without proper treatment it can start to kill you within 2 days. Swine flew symptoms are same as normal flew but more severe.
hmm. could be that no one knew why the flu kept getting stronger and more advanced
Flu viruses cause disease, they cause influenza (flu). They are the infectious agents of the flu. The viruses are submicroscopic organisms that infect your body and that give you the influenza, the disease.