With an immune response.
When particles of a virus enter our body and are identified by the immune system as foreign "invaders", our bodies use the invaders, which are also called antigens/antibody generators, as a template to create matching antibodies. Antibodies (also called immunoglobulins) are sort of like a lock and key system that, when matched perfectly with the antigens, can "lock" or neutralize the antigens so they can no longer enter or damage our cells. To neutralize each different strain of organism, the antibodies must have the right pattern to match the characteristics of each antigen. A match will allow the antibodies and immune response to make a "lock" to fit those viruses. Our body remembers each new virus pattern that has caused an immune response in the past (either from getting an infection or from vaccinations), so that it can make those matching cells to protect us from that same specific flu strain (or strains that are very similar) in case it ever enters the body again in the future.
Our body has the ability to determine when a virus has invaded and, if it has a match to that strain of virus stored from a prior invasion, the immune response is generated and the immune system quickly makes up a lot of those attack cells (antibodies), that the body made and that worked in the past to destroy/neutralize the invading virus particles. If it is a new invading virus, usually our body can make cells that can match just right in a week to ten days. (It can sometimes do this even more quickly for bacteria and other microbes.)
It is during this time period, when our body is matching and making the attack cells to "kill" the invader, that we feel sick until our body finds the key pattern of cells that will match and lock that specific virus. Our immune system wastes no time in locking up the invading organism, because it knows already what antibodies will work. That is why, once we have had a flu virus like Swine Flu before, we won't get sick from it again. Our body will already know what cells to make and will send them out to destroy the invader even before it can make us feel sick.
Your immune system helps the body get rid of germs.
Eating unhealthy food will not cause you to get a cold. Viruses cause people to get a cold.
Large number of viruses can cause common cold.
flu,HIV,cold
Viruses cause the common cold, usually the rhinovirus (up to 40% of colds), or Coronavirus (about 20%), but there are more than 200 viruses that can cause the common cold. The idea that cold weather causes colds is a long held traditional concept from back before it was known that viruses existed or that they were the cause of the common cold. See the related question below for more information about why the cold and flu have a season that is during the cold weather in most places.
Some diseases caused by sperical shaped viruses cause the flu & the common cold. Rod shaped cause HIV & herpes.
Usually viruses cause cold-like symptoms, such as the viruses that cause the common cold and the flu, but, other diseases and disorders can also include similar symptoms and so can toxic effects from chemicals and drugs.
No, colds are caused by viruses and being cold does not cause or worsen a cold. See the related questions.
Cold sores and chickenpox are caused by viruses. Other diseases can be cause by viruses as well but also bacteria.
Bacteria,fungi,or parasitic worms invade the human body.
No. It is a virus. There are 200 viruses that cause "colds".
No. Not unless there are a good deal of cold viruses in your house... not typically will you get a cold from being inside. The Common Cold is caused by sickness viruses in the outdoors. It is nearly impossible to get the cold from being indoors.
Viruses cause 90-95% of all sore throats. Cold and flu viruses. adenoviruses. coxsackie virus. mononucleosis.