What Is A Viral Infection And What Causes It?
A viral infection is caused by a virus, for example a flu virus, the sars virus, avian flu and others The virus is spread by droplets of the virus present in the saliva of the host person, when they sneeze or blow their nose, they are released into the air and the virus can easily be spread to other people, near them. Virologists who study these viruses, which are constantly changing adapting and mutating to survive, try to produce a vaccine to protect us against them. Since viruses do not react to antibiotics in the same way that bacterial infections do, scientists have to try to predict what the next step will be when confronted by ever new viruses.
